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Liebert 30-130kVA User's Manual

1. 21 Operation In this example power is available from the normal and bypass sources as well as from the battery Notice that the switching devices are all closed except for the bypass switch at the top The load is operating on conditioned power from the inverter The battery is being charged by the rectifier The static switch is operative and ready to respond to momentary demands for overload current Figure 11 Mimic display screen example utility fail MIMIC DISPLAY BYPASS INPUT FAULTS In this example we see that a utility failure has shut down both the normal and bypass power sources The battery is connected and supplying power to the load MAIN MENU MIMIC DISPLAY MANUAL TRANSFER STARTUP SHUTDOWN BATTERY MANAGEMENT STATUS REPORTS CONFIGURATION Figure 12 Mimic display screen example load on bypass UPS module on and charging battery MIMIC DISPLAY BP BYPASS FAULTS ALARMS 0 Liebert MAIN MENU 22 Operation In this example the load is receiving power through the bypass switch Notice that the input power source is available and the battery is being charged Figure 13 Monitor mimic display screen example load on bypass UPS module off service mode MIMIC DISPLAY SERV BYPASS SS RECT BATTERY T SYS STATUS Liebert CEN In this example the power is coming f
2. o 34 Status report SCREEN sve ets ssh SA el re to ets oo eed wh atts eee 35 Event log report screen showing most recent event n ooo 36 Event log report screen showing previous event 0 0 0 eee nee nas 36 Event log report screen showing previous event 0 0 0 eens 36 History log metering report sereen 1 eee ee eee eee eens 37 History log status report screen 38 History log faults alarms report screen 38 COnMPUFATIONSCFERN A a a Bs TET T AA eae a 9 SS ova one iti 39 System rane Sy Paced a a eid nea Tae Hk SATE SiR Meant bee tele senate 40 System ratings Pare da tea te pata wa SQ ley ersten eS 40 System settings screen page lo 40 D te setting Screens lt grata A wee Bk ae GOES Fe A EN BO OOS E 41 Tim s tting SCENE eg ae es A Bab OR A BA I Re 41 System settings Pare os BOR A A A A A ad 42 System settings page iii A het wh a ee eats eos Sa aa a da dd 42 Enter password Screen yo ad BR 42 Single dual in put screen tas Tanteu tee AG eee A ia 43 iii Figure 50 Figure 51 Figure 52 Figure 53 Figure 54 Figure 55 Figure 56 Figure 57 Figure 58 Figure 59 Figure 60 Figure 61 Figure 62 Figure 63 Figure 64 Figure 65 Figure 66 Figure 67 Figure 68 Figure 69 Figure 70 Figure 71 Figure 72 Figure 73 Figure 74 Figure 75 Figure 76 Figure 77 Figure 78 Figure 79 Figure 80 Figure 81 Figure 82 Figure 83 Figure 84 Figure 85 Figure 86 Figure 87 Figure 88 Figure 89 Figure 90 Figu
3. 40 Operation Time To set the system s real time clock do the following 1 From the System Configuration screen press the Up or Down button to move the highlighted cursor to TIME 2 Press SELECT The TIME screen will appear 3 Press SELECT to move the arrow to the next digit to the right 4 When the arrow is on the digit to be changed press the Up or Down button to increase or decrease the hour minute second number Press SELECT to set the value and move to the next digit 5 After the correct hour minute second has been set press SELECT again to return to the System Configuration screen NOTE 1 Precise Date and Time functions are required for accurate archival and event history purposes 2 Both the Date and Time can be set from a remote terminal Refer to Section 3 5 Communication Interfaces Figure 45 Time setting screen CURRENT TIME 04 33 18 Figure 46 System settings page 2 SYSTEM SETTINGS ORDER NUMBER 00000000 SYSTEM CONFIG SMS SYSTEM MODULE 1 NUMBER OF MODULES IN SYSTEM 1 NUMBER OF BATTTERY CABINETS 1 NEXT PREV CANCEL SAVE 8 EXIT To continue configuring the system highlight NEXT and press SELECT 41 Operation Figure 47 System settings page 3 SYSTEM SETTINGS SINGLE DUAL INPUT DUAL OUTPUT TRANSFORMER BYPASS WIND NO BYPASS AUTO TRANSFORMER T3 NO OPTIONS COMM OPTIONS PREV CANCEL SAVE 8 EXIT The Single Dual Input Screen i
4. Alarm NO YES NO YES With input current levels above 30 of nominal and all three phase voltages within 5 of each other there is a difference between any single input phase current and the average input phase current of more than 25 The UPS will open the Input filter Contactor The alarm will clear when the difference in current falls below 20 but the Input filter contactor will need to be reset using the front panel Refer to manual start up instructions Input Line Fail Input Line Fail Alarm NO NO NO YES The rectifier input line voltage is outside of specified limits or the input circuit breaker is opened while the battery circuit breaker remains closed The battery supplies power to the critical load through the UPS inverter Input OF UF Input OF UF Alarm NO YES NO YES The input frequency is gt 5 of the nominal frequency The UPS will begin using the battery to supply power if by the end of discharge the problem is not corrected for single input units power to the load will be lost for dual input units the system will attempt transfer to Bypass if qualified and available Input Phase Loss Input Phase Loss Alarm NO YES NO YES For all of these input problems the system will supply power from the battery until the end of discharge At that point single input systems will lose power to the load Dual input systems will attempt to transfer to bypass
5. NOTE The only time the System Ratings can be changed is when the UPS is first powered up After that they remain locked Pressing NEXT at the System Ratings screen will bring up page 2 of System Ratings below Figure 42 System ratings page 2 SYSTEM RATINGS DC BUS VOLTS INPUT FREQUENCY OUTPUT FREQUENCY PREV 39 Operation System Settings The System Settings are multiple screens that are used for setting the date time language ID num ber Tag number and other parameters The first page of the System Settings screen can be accessed by highlighting Systems Settings on the Configuration screen Figure 40 and pressing SELECT Figure 43 System settings screen page 1 SYSTEM SETTINGS DATE 01 05 2001 TIME 11 16 441 LANGUAGE ENGLISH ID NUMBER 00000000 TAG NUMBER 00000000 NEXT CANCEL SAVE amp EXIT Date To set the system date From the System Settings screen press the Up or Down button to move the highlighted cursor to DATE Press Select The DATE screen will appear Press Select to move the arrow to the next digit to the right When the arrow is on the digit to be changed press the Up button to increase the number or the Down button to decrease it Press Select to set the value and move to the next digit After the correct month day year has been set press Select again to return to the System Config uration screen Figure 44 Date setting screen CURRENT DATE 01 20 2002
6. The Rotary Switch has 3 positions NORMAL The Normal switch position is used under most operational conditions BYPASS The Bypass switch position directs the power flow through the Internal Bypass Circuit The UPS module may be either on or off If the UPS module is on and the batteries require charg ing charging will take place SERVICE The Service switch position directs the load to the Internal Bypass Circuit so the UPS can be serviced A 4 NOTE For purposes of this manual assume that the rotary switch will always be in the NORMAL position NOTE If the position of the rotary switch must be changed as in servicing it is imperative that the Operator observe the light in the corner of the Rotary Switch panel before making any change The switch position may be changed only if the light is green Never move the switch if the light is red Instead call the Liebert Global Services technician NOTE The LED light is positioned in the lower left hand corner 17 Operation 3 2 Security Access and Passwords Password protection is provided in the Npower UPS system to protect you from any unauthorized con figuration of the system A default password is installed on your system when you receive it The default password is NPWR It is important however that you enter your own secure password as soon as possible The following procedure will enable you to do this 1 From the MAIN MENU on the Display Screen navigat
7. Battery Overtemp CB Trip Battery Ground Fault CB Trip Bypass Power Supply Fail EPO Shutdown Heatsink Overtemp Limit Input Power Supply Fail Output Power Supply Fail Outlet Air Overtemp Limit Power Supply F1 Fail SWGR Power Fail DC Undervoltage Steady State DC Overvoltage Steady State Rectifier Fail Inverter Fail Overtemp Time out Shutdown Fault Transfer Failed Shutdown Controller Fault SBS on Hardware Shutdown MM Control Power Fail MM Memory Fail Option Power Supply Fail 3 4 2 Alarms An alarm is an indication of an abnormal system condition significant enough to warrant being annunciated and logged Alarm conditions may indicate that a UPS system parameter is out of its normal operating range or may signal an external problem In some cases an alarm may trigger a corrective action Many alarm conditions will return to normal in due time and the alarm itself will no longer be active Summary Alarm The Npower system features a Summary Alarm which captures the presence of individual faults and alarms This alarm may be assigned to any PRB relay See Customer Alarm Interface on page 52 The Summary Alarm can be accessed from the list of alarms faults Figure 80 by scrolling up and down the list For navigation instructions see Customer Alarm Interface on page 52 When the Summary Alarm is in the active position it will be flashing at the top of the screen
8. Figure 109Summary alarm in active position screen ALARM FAULT NAME L D F E DELAY YYNY55 15 ON BATTERY YYYY 00 INPUT CONTACT 1 YYYY 00 INPUT CONTACT 2 YYYY 00 INPUT CONTACT 3 YNYY 00 INPUT CONTACT 4 YYYY 00 UP DOWN 2130 EXIT DESCRIPTION L Latching D Dial 72 Operation Highlight the SELECT position on the display screen to bring up the Summary Alarm Editing screen allowing the Operator to edit the parameters of the summary alarm Figure 110 Summary alarm editing screen ALARM FAULT NAME SUMMARY LATCHING DIAL FREEZE EVENT LOG SAVE amp EXIT CANCEL When the New Alarm System Summary Alarm or Module Summary Alarm is activated you can get more information at the Operator Display Panel through a remote terminal or a modem For further information see 3 5 Communication Interfaces Table 6 Abbreviations used in alarm messages Auto Automatic Avail Available Batt Battery Byp Bypass Cap Fuse Capacitor Fuse Cont Power Control Power Equip Equipment H W Hardware Inv Fuse Inverter Fuse OF UF Over Under Frequency Ov temp Overtemperature O volt Overvoltage Ph Seq Phase Sequence Rect Fuse Rectifier Fuse Rexfer Retransfer Shutdn Shutdown Static Sw Static Switch Un volts Undervoltage Xfer Transfer 73 Operation Alarm Messages The alarm message area displays the alarm conditions that are pres
9. MESSAGE SYS TIME SET BY OP gt 2 TYPE ALARM 17 INITIATED BY MICRO MONITOR BRAM NEXT EXIT 02 20 21 6 10 00 35 Operation History Logs The History log contains pertinent data recorded just before and after an event that triggers a signifi cant action such as an inverter failure There are two History logs each consisting of 64 frames Each frame is a sequential snapshot of UPS generated parameters The UPS records these frames continu ously at 4 millisecond intervals during normal operation When a fault occurs the UPS stores 40 frames prior to the triggering event the frame of the triggering event and 23 frames immediately fol lowing the triggering event The frames are numbered 40 23 with frame O designated as the triggering event that initiates the fault or alarm condition The Operator can go back 40 frames from the triggering event and forward 23 frames There are nine possible triggering events Rectifier fail Battery Low Transfer Output Overvoltage Transfer Output Undervoltage Transfer Inverter Fail Inverter Overload Transfer Heatsink Overtemp Limit Outlet Air Overtemp Limit Fault Load Transfer to Bypass The data logged in each frame consists of metering data machine status information active faults alarms and fault alarm conditions Figure 37 History log metering report screen HISTORY LOG1 P1 METERING 14 18 49 02 10 00 OUT V OUT IN V IN LOAD DC FREQ L N I
10. questions Byp ovid Shutdown Bypass OverLoad Shutdown Fault YES YES NO YES With the load on Static Bypass the system has determined that at least one phase of the Bypass has exceeded the KVA KW or RMS current vs Time overload spec The Static Bypass switch will be turned of and the system will be shut down Power to the load will be turned off Remove the excess load from the UPS and attempt to re start If the load is below the rating of the UPS and it will not re start contact Liebert Global Services Byp Phase Rot Error Bypass Phase Rotation Error Fault NO NO NO YES The power conductors on the bypass line are not wired to the UPS in the required sequence This alarm should appear only during initial start up or after a repair to the source power system Disconnect power from the bypass line and correct the wiring Liebert Global Services must be present during initial start up of your UPS System IDC Peak IDC Peak Fault YES YES NO YES The system has detected a failed IGBT The unit will transfer to Bypass if available Contact Liebert Global Services immediately 75 Operation Table 7 Alarms functions and corrective actions continued Actual Alarm fault Name Displayed On Front Panel Inverter Ovld xfer Inverter Fuse Fail Description of Alarm Fault Inverter Overload Transfer Inverter
11. the rectifier automatically restarts and resumes carrying the inverter and battery recharge load requirements 10 Theory of Operation 2 2 4 Operation After End of discharge The battery time screen displayed on the control panel enables you to estimate when battery shut down will occur You will have enough time to energize an alternate AC power source or to initiate an orderly shutdown of the critical load If the battery plant discharges to the shutdown point during an outage the UPS automatically disconnects the load the AC input and the battery After AC input power is restored the rectifier can be manually restarted by the Operator Battery Disconnect The module battery disconnect MBD circuit breaker is used to isolate the UPS module from the bat tery during maintenance and to automatically disconnect the battery from the inverter at the end of battery discharge The MBD circuit breaker must be closed manually unless you have the optional motorized battery breaker See 3 3 8 Auto Restart Battery Charge Current Limiting The battery recharge current after a battery discharge is limited to between 1 and 25 adjustable of the full load maximum discharge current stated in AMPS This regulates the amount of current that flows from the power source to the battery while the battery is recharging The battery charge current limit is factory set at one half of maximum or 12 5 for normal operation and at 1 for alte
12. 3 1 1 Operator Control Panel The Operator Control Panel enables the operator to perform the following tasks Obtain a quick indication of operational status Is the critical bus OK Is the UPS system OK Is the battery available Is the bypass line available Monitor the power flow through the UPS system and monitor all meter readings Is the critical load being supplied power from the UPS system or bypass Are input battery and output voltage frequency and current readings at nominal levels How much battery time is still available during an outage Is the battery recharging after discharge e Execute operational procedures Perform critical bus transfer retransfer between the UPS and the bypass line Start up and shutdown the UPS Shutdown the system instantly in the event of an emergency Access status reports and history files Obtain a complete listing of the present status of the UPS including input output and bat tery voltage frequency and current readings and any alarms that may be present Review a complete history report of all events leading up to and immediately after a fault con dition Examine an archive listing of all alarm conditions that have occurred over a period of time Make adjustments to programmable parameters access limited by Security Access function Set the date and the time functions Change the auto dial phone number and the modem options Select the number of
13. 540 A The equalize voltage is also programmable In the example above the range is 520 to 580 volts with the default being 540 volts Battery Temperature Compensation Charge The Battery Temperature Compensation Charge screen is accessed from the Battery Management Screen Figure 83 The Operator can enable or disable Battery Temp Compensation function He can also change the compensation setting by going into the edit screen The values are in millivolts degree C Figure 93 Battery temperature compensation charge screen BATTERY TEMP COMPENSATION CHARGE BATTERY TEMP COMPENSATION ENABLED TEMPERATURE lt 20C 850 TEMPERATURE 25 C 1000 TEMPERATURE 30 C 1000 TEMPERATURE 35 C 850 NEXT EXIT 61 Operation To enable or disable the Battery Temperature Charge highlight the top line in the screen above and press the SELECT button This will bring up the following screen Figure 94 Battery temperature compensation enable disable screen BATTERY TEMP COMPENSATION ENABLE DISABLE To access page 2 of the Battery Temp Compensation Charge Screen press NEXT on the Battery Temp Compensation Charge Screen see Figure 93 Figure 95 Battery temperature compensation charge screen page 2 BATTERY TEMP COMPENSATION CHARGE TEMPERATURE lt 40C TEMPERATURE lt 45C EXIT To edit the Battery Temperature Compensation select the second line from the top in Figure 93 and press the SELECT button The followin
14. AB BC CA e Bypass Frequency Bypass Phase Difference 4 OUTPUT LOAD Select LOAD from the Monitor Mimic Display screen to bring up this block It displays total output power to the critical load in kVA and kW The critical load current per phase is also displayed in this block Note that kW is not displayed when the load is on the bypass line During an overload condition the time remaining before transfer is displayed at the bottom of the load box Press SELECT to return to the Mimic Display Screen Figure 18 Output load status screen OUTPUT LOAD STATUS A B C V L L 205 203 207 FREQ 59 9 HZ V L N 120 117 118 OF RATED LOAD 5 5 162 KVA 42 KA 1 1 49 KW 42 KW 15 OVLD COND SEC 25 Operation The Output Load status screen displays the following real time data Output AC Volts AB BC CA Output AC Volts AN BN CN Output Current A B C Output kVA kW A B C Output Frequency rated KVA and kW Overload Condition with timer in seconds 5 SYSTEM STATUS When the SYSTEM STATUS box on the Mimic Display Screen Figure 14 shows a flashing FAULTS AND ALARMS message highlight it and press SELECT This displays information about faults and alarms Fault messages are displayed in reverse video highlighted light on dark while alarm messages are displayed in regular video dark on light Alarm messages activate the audible alarm until the ALARM SILENCE button is pressed To clear a latching alarm
15. Fuse Fail Fault Or Alarm Fault Fault Latch Mask YES YES Dial Mask YES YES Freeze Mask YES NO Event Log Mask YES YES Meaning and Corrective Action s With the load on UPS at least one phase of the UPS KVA or KW has exceeded the rated KVA KW or RMS current vs Time equation Note This fault would have been preceded by an Inverter Overload Phase x alarm The UPS will transfer the load to Static Bypass if it is available If the fault or overload clears the UPS will automatically transfer from SBS to UPS Remove the excess load from the UPS and attempt to re start If the load is below the rating of the UPS and it will not re start contact Liebert Global Services One or more Output Fuses are open because of capacitance in the system it may take up to 1 minute after a fuse failure to detect this fault The system will transfer the load to Static Bypass if available and then shut down the UPS Contact Liebert Global Services Immediately Output Ov xfer Output Overvolt Transfer Fault NO YES YES YES The UPS module output voltage is above the maximum 10 deviation from nominal The load automatically transfers to the bypass line The UPS module is shut down and isolated Contact Liebert Global Services at once Do not attempt to reset circuit breakers Output Uv xfer Output Undervolt Transfer Fault NO YES YES YES The UPS mod
16. INPUT CONTACT ISOLATOR YES REMOTE ALARM 1 YES NEXT EXIT The Internal Modem Option allows the system to dial out or receive incoming calls To set dialing fea tures and to enable internal or external modem press MODEM on the first page of the Communica tions Options screen The Auto Dial screen will be displayed Figure 56 Auto dial screen AUTO DIAL MODEM INTERNAL PRIMARY LINE SECONDARY LINE INIT STRING MAX BAUD RATE NEXT To get to the Modem Selection screen highlight MODEM and press SELECT The following screen will come up showing that the modem is disabled Figure 57 Modem selection screen DISABLED EXTERNAL INTERNAL DISABLED 45 Operation To enable the modem highlight INTERNAL or EXTERNAL and press SELECT The Auto Dial screen will return Figure 56 except instead of DISABLED the message will read INTERNAL or EXTER NAL After enabling the modem the Operator can proceed to configure Auto Dial settings at the AUTO DIAL screen To input the phone number for the primary line highlight PRIMARY LINE and press SELECT The Operator can input up to 20 digits In a similar manner the Operator can input the numbers for the secondary line To set the initialization string highlight INIT STRING and press SELECT The default for the inter nal modem is ATSO 1 To change this setting highlight INIT STRING After making the change press SELECT repeatedly until the cursor moves to
17. If Operator selects SKIP the Mimic Display screen is momentarily displayed followed by the screen enabling modification of DC Bus Setpoint Figure 26 DC bus setpoint screen MODIFY DC BUS SET POINT TARGET AND RAMP VALUES TARGET V 540 29 Operation New Target and Ramp settings are temporary settings for diagnostic testing or special situations Each time the UPS is placed online the settings return to the default values Custom T and R entries are only allowed when rotary switch is in Bypass position The Operator normally does not have to change Target and Ramp settings Therefore he should select SKIP and proceed to the next step which is to turn on the Rectifier and Inverter Operator is issued the prompt on the Mimic Display Turn on Rect Pressing OK will turn on the rec tifier which will take up to one minute If the rectifier does not turn on within two minutes the UPS will automatically make a second attempt Next Operator is issued the prompt Turn on Inv Pressing OK turns on the inverter taking up to one minute If it does not turn on within two minutes the UPS will make a second attempt Next Operator is prompted to Close Batt CB The battery circuit breaker does not have to be closed to bring the unit online This step can be skipped in both NORMAL and BYPASS positions The CLOSE BATT CB screen will offer a choice of OK or SKIP If you wish to move ahead
18. L L KVA KW HZ 120 208 52 74 59 540V 60 0 OUTPUT 120 208 52 74 59 65A 60 0 INPUT 120 208 52 74 59 124 C PREV NEXT SLUIERS ALARMS EXIT FRAME 0 The default page is the METERING page which provides the following data 3 phase Output Volts L N 3 phase Output I amps 3 phase Input volts L L 3 phase Input I amps 3 phase load kVA DC Bus Volts DC I charge discharge Input Frequency and Output Frequency Battery Temperature 36 Operation The second page is the STATUS which includes Static Bypass Switch Line Open Closed Static Bypass Switch Load Open Closed Input Contactor Open Closed Output Contactor Open Closed Trap Filter On Off If installed Int MBP Normal Bypass Service Ext MBP Open Closed Battery CB Open Closed SBS On Off Rectifier On Off Inverter On Off Figure 38 History log status report screen HISTORY LOG 1 P2 STATUS 14 19 50 02 10 00 SBS LINE TRAP ma SBS OFF SBS LOAD ium INT MBP SERVICE RECT OFF INP DELTA EXT MBP OPEN INV OFF OUTPUT BATT CB OPEN PREV NEXT AMUS METER EXIT FRAMEO The last page includes faults The alarm conditions that cause the History Status buffer to store and freeze data are Rectifier fail Battery Low Transfer Output Overvoltage Transfer Output Undervoltage Transfer Inverter Fail Inverter Overload Transfe
19. NAME BATT FUSE FAIL BATT LOW TRANSFER DC OV TRANSIENT INPUT PHASE ROT ERROR RECTIFIER FUSE FAIL RECTIFIER DRIVE 1 FAIL UP DOWN SELECT EXIT DESCRIPTION lt lt lt lt lt lt j m Latching D Dial The Alarm Fault Name Screen can be accessed from the Configuration Screen Figure 40 by high lighting Alarm Mask and pressing SELECT When the Alarm Fault Name Screen is displayed the highlighted alarm will be flashing In the fig ure above BATT FUSE FAIL will be flashing The DESCRIPTION at the bottom of the screen defines the letters L D F and E The DESCRIPTION scrolls from right to left allowing the Operator to see the entire list of features The Operator can determine the status of the Latching Dial Freeze and Event Log Mask and change certain attributes by following these steps NOTE When additional navigational choices UP DOWN and SELECT appear at the bottom of the display screen the customary rules change slightly 1 Select the alarm to be viewed a Toscroll down the list highlight DOWN on the display screen and press the SELECT button Continue pressing SELECT until the appropriate alarm is moved to the top position on the screen Then use the arrow keys to highlight SELECT on the display screen Press the SELECT navigation button to bring up the Edit screen below b To scroll up the list highlight UP on the display screen and proceed as in a 2 After edit
20. NOTE The default setting is 5 The maximum limit changes according to the number of battery cabinets and the time rating of each For a single battery the upper limit is T1 For more than one battery the upper limit is approximately equal to the total battery time After setting the time press SELECT to save the changes and return to the previous screen Battery Supplement This feature allows the UPS to continue to supply power to the output from both the rectifier and the battery when the input voltage sags This mode of operation will keep conditioned uninterruptible power at the output for a longer period of time as compared to just turning off the rectifier when the input voltage sags The feature is permanently enabled at the present time and can be identified by an alarm reading Battery Supplement Active The alarm will clear when the Input Undervoltage alarm clears and or if the rectifier turns off and or if the Battery Discharge alarm clears There will be 1 second delay before setting or clearing this alarm Auto Restart The Auto Restart feature allows the UPS to restart without operator intervention after shutting down due to loss of input power When the utility is restored this feature directs an automatic restart delivering the load power through the inverter connecting the batteries to the DC bus and recharg ing the batteries To utilize this feature your system must have Liebert motorized Battery Breakers on each
21. battery cabinet The first step is to enable the Auto Restart feature From the Configuration Screen select System Settings and then Options From the Options Screen select Auto Restart and select YES The fac tory default is set to NO This option is password protected After enabling the Auto Restart feature proceed to the Auto Restart Setting screen From this screen the Operator can set the restart to System the default is Disabled and program a source qualifica tion timer To access this screen navigate to Configuration and then to User Settings Select Auto Restart The following screen will come up 66 Operation Figure 103Auto restart setting screen AUTO RESTART AUTO RESTART SETTING SYSTEM AUTO RESET TIMING 5 The source qualification timer dictates how long to allow for input and bypass voltages to return to their nominal limits The default value is 100 with a programmable range of 5 100 minutes Since a setting of 100 signifies an infinite wait time the finite range can be set between 5 and 99 minutes Normally 5 minutes is adequate Setting the Auto Restart to SYSTEM automatically changes the setting for Motorized Battery Breaker to Motorized The battery type setting cannot be changed back to Manual once Auto Restart is set to YES However if Auto Restart Option is Disabled Set to NO battery type can be independently set to Motorized To access the proper screen navigate to Configurati
22. end of buffer is near The alarm messaged is defined as BATT CYCLE BUFFER FULL The alarm is kept active for a minimum of 30 seconds to allow the software to download the 128 cycles to the terminal port and also dial out with this alarm providing the modem option is installed and enabled The cycle storage continues to 132 The 133rd event will override the first event in the buffer But the previous cycles will not be destroyed until overwritten with future BMC cycle data REMOTE MONITORING The information within each of the time buckets and summary status page can be retrieved via the Terminal and Modem ports See 3 5 1 RS 232 Port Local Reporting Terminal for a list of commands used to retrieve Service Terminal Information Battery Time Low Warning The Battery Time Low Warning Feature alerts the Operator to the battery time remaining in min utes The Operator can set the warning time by navigating from the CONFIGURATION Screen to USER SETTINGS Page 2 This screen is illustrated below Figure 101User settings page 2 USER SETTINGS BATT TIME LOW WARNING 5 BATT TIME T 1 AT 100 15 BATT TIME T 2 AT 50 45 BATT EOD LOWER SET POINT 384 BATT EOD UPPER SET POINT 427 NEXT PREV CANCEL SAVE 8 EXIT 65 Operation Highlight BATT TIME LOW WARNING and press SELECT to bring up the following password pro tected screen Figure 102Battery time low warning screen 3 3 8 BATT TIME LOW WARNING
23. for visible and audible indications of problems Log the inspection metered parameter indications and any discrep ancies Air Filters The air filters must be inspected and serviced on a regular schedule The period between inspections will depend upon environmental conditions Under normal conditions the air filters will require cleaning or replacement approximately every two months All Npower models have replaceable filter elements behind the grille in the front of the unit This ele ment can be changed with the UPS operating by opening the outer door for access Abnormal or dusty conditions will require more frequent cleaning and replacement of air filters Inspect installations in new buildings more often then extend the inspection period as experience dic tates Battery Maintenance WARNING These maintenance procedures will expose hazardous live parts Refer servicing to qualified personnel DC fuses operate at the rated battery voltage at all times A blown DC bus fuse indicates a serious problem Serious injury or damage to the equipment can result if the fuse is replaced without knowing why it failed Call Liebert Global Services for assistance 97 Maintenance 4 2 4 Battery Safety Precautions Servicing of batteries should be performed or supervised by personnel experienced with batteries and the required precautions Keep unauthorized personnel away from batteries When replacing batteries use the same n
24. if qualified and available Call Liebert Global Services for Assistance Input UnderVoltage Input Under Voltage Alarm NO NO NO YES For all of these input problems the system will supply power from the battery until the end of discharge At that point single input systems will lose power to the load Dual input systems will attempt to transfer to bypass if qualified and available Call Liebert Global Services for Assistance 80 Operation Table 7 Alarms functions and corrective actions continued Actual Alarm fault Name Displayed On Front Panel Input OverVoltage Description of Alarm Fault Input Over Voltage Fault Or Alarm Alarm Latch Mask NO Dial Mask NO Freeze Mask NO Event Log Mask YES Meaning and Corrective Action s For all of these input problems the system will supply power from the battery until the end of discharge At that point single input systems will lose power to the load Dual input systems will attempt to transfer to bypass if qualified and available Call Liebert Global Services for Assistance Input current limit Input Current Limit Alarm NO YES NO YES The RMS input current has reached the Input Current Limit setting Check the UPS load Battery CB Open Battery CB Open Alarm NO YES NO YES The module battery circuit breaker MBD is open This ci
25. manual transfer Manual Manual from Bypass to UPS from the front panel ReXFER Retransfer Alarm NO NO No YES controls Momentary display Sets flag in the event history log With batt breaker closed Monitor has Batt Cycle Battery Cycle determined that the buffer that keeps track Buff Full Buffer Fu Alarm NO NO NO YES lof the number of hits the battery has taken is full No action required 86 Operation Table 7 Alarms functions and corrective actions continued Actual Alarm fault Name Displayed Description Fault On Front of Alarm Or Latch Dial Freeze Event Log Panel Fault Alarm Mask Mask Mask Mask Meaning and Corrective Action s If Auto Restart feature is installed and enabled and the last shutdown was due to a failed Batt Low Transfer the Monitor will automatically attempt to perform the ae eee Alarm NO NO NO YES normal startup sequence when power is reapplied to normal value This alarm is issued if the restart could not be performed before the Auto Restart timeout expired The Monitor will abort the auto restart An automatic retransfer will be initiated Auto Rexfer Auto when the OK to Transfer condition has Primed Retransfer Alarm NO NO NO YES been present for 10 seconds if the Primed overload has dropped below 100 of the rated load LBS Active LBS Active Alarm NO NO NO YES The Load Bus Sync Option is active ee On Gen Active Ala
26. nominal If the load has been shut down re start will be required Bypass Line Fail Bypass Line Fail Alarm NO YES NO YES The bypass source has dropped below 35V per phase On single input units the UPS will shut down On dual input units transfer to the bypass will be inhibited The alarm will be cleared five seconds after all voltages again exceed 45V If the unit is already on Bypass when this occurs power to the load will be lost 81 Operation Table 7 Alarms functions and corrective actions continued Actual Alarm fault Name Displayed On Front Panel SBS Ovld Phase A Description of Alarm Fault SBS Overload Phase A Fault Or Alarm Alarm Latch Mask NO Dial Mask Freeze Mask NO NO Event Log Mask YES Meaning and Corrective Action s With the load on Static Bypass the phase A output kVA or kW or RMS current has exceeded 115 of the nominal per phase kVA or kW or RMS current rating The UPS will show time remaining until a shutdown will occur per the Overload vs time curve The alarm will clear when the overload falls to below 110 of the rating SBS Ovid Phase B SBS Overload Phase B Alarm NO NO NO YES With the load on Static Bypass the phase B output kVA or kW or RMS current has exceeded 115 of the nominal per phase kVA or kW or RMS current rating The UPS will show time remaining unti
27. on the UPS module for the above conditions If the UPS system overload capacity is exceeded an automatic transfer to bypass is initiated which keeps the static switch on and opens the inverter output contactor Whenever you have an overload condition you should determine the cause of the overload Bypass Internal The UPS control logic initiates an automatic transfer to the bypass source if the overload current ver sus time curve is exceeded or if specified UPS system faults occur You can also manually transfer the load to the bypass without interruption if you must take the UPS module out of service for mainte nance With the rotary switch in the Bypass position most key components and operating modes can be checked without disturbing the critical bus However certain key power carrying components will require complete system shutdown or isolation through an external maintenance bypass cabinet for 100 service External Maintenance Bypass The installation of an External Maintenance Bypass Cabinet or panel board is recommended to allow you to totally isolate the UPS from all power sources Use of the External Maintenance Bypass is described in SIB External Maintenance Bypass on page 30 Off Battery The battery plant can be disconnected from the rectifier charger by using an external Module Battery Disconnect MBD circuit breaker The UPS continues to function normally though it does not have power outage back up capability unt
28. or rectifier fault condition power logic or over temperature present or imminent f Failure of system logic or logic power Manual Transfers Manual transfers may be initiated at any time provided no transfer inhibition conditions are present Transfer Inhibited A manual transfer to the bypass source will be inhibited if any of the following conditions exist a Bypass frequency deviates 0 5 Hz from the nominal b UPS system to bypass voltage difference DV exceeds a predetermined percentage normally 10 c OK to Transfer signal from the control logic is not present Automatic Retransfers to UPS Critical bus conditions that must be present to initiate an automatic retransfer Auto Rexfer of the critical load from the bypass source to the UPS system are a The number of Auto Rexfer Attempts selected must be greater than zero 0 If zero 0 is selected no automatic retransfer will occur b Critical load was initially transferred to the bypass source due to a system overload only c Overload has since been eliminated the load has dropped below 100 of the rated load d Both the Input contactor and Battery MBD circuit breakers have remained closed since the overload transfer e OK to Transfer signal received from the control logic for at least 10 seconds within 5 minutes of the overload transfer A manually initiated retransfer from bypass is required for overloads lasting 5 minutes or more f Cyclic type s
29. phase has exceeded its Pulse by Pulse current limit value An Inverter Current Limit alarm was already issued and pulse parallel operation was initiated At the end of pulse parallel the load current has not be reduced below 150 The load will transfer to Static Bypass If the fault or over load clears the unit will retransfer to UPS Check the total load compared to the UPS rating reduce load where necessary If the UPS does not retransfer when the load is below 100 of the rated load or if the unit shuts down contact Liebert Global Services Immediately Batt ovtemp cb trip Battery Overtemp CB Trip Fault YES YES NO YES With the battery breaker closed and the Battery Overtemp Breaker Trip option enabled the internal battery temperature has exceeded its Maximum set point value The battery UV trip will be activate and the battery will be disconnected from the UPS Battery Back up is no longer available Check the battery to determine the possible cause of the overload and remove if possible Once the battery has cooled below the set point temperature the battery may be brought on line again If the problem recurs contact Liebert Global Services Batt gnd CB trip Batt gnd fault CB trip Fault NO YES NO YES With BGF option installed BGF breaker trip enabled and batt breaker closed Comms DPS sees its BGF input asserted by the SWGR It will issue a batt breaker UV trip and mo
30. several factors how long the overload lasted how many overload conditions occurred before transfer whether there is an imminent failure of any part of the UPS etc In the unlikely event of a fault within the UPS the control logic which continuously monitors all critical circuits within the UPS system transfers the load to bypass without interruption and simultaneously sets off local and remote alarms For a few specified faults the UPS is shut down The UPS can be manually returned to service when the fault has been corrected The Npower UPS display system provides precise monitoring of the UPS fast alarm response and quick troubleshooting For easy manual operations menu driven software provides access to several step by step help screens All operator functions are performed using menu prompted displays and a minimum number of operator controls Available options include external communication capability with both automatic dial out and dial in features for early warning and diagnosis of abnormal condi tions The system software allows the operator or Liebert Global Services to enter application specific infor mation Overload overvoltage battery discharge and shutdown limits can be set by the operator In effect the software is tailored for each site The UPS system protects critical equipment from source power disturbances and outages load faults and UPS malfunctions This triple protection virtually eliminates computer and comput
31. shown in this screen 53 Operation To change the relay assignment select RELAY ASSIGNMENTS from the screen and press SELECT The following screen will appear Figure 76 Relay assignments RELAY ASSIGNMENTS AS400 STD SET USER DEFINED If you select STD SET the following screen will be displayed Figure 77 Programmable output relay board standard set PROGRAMMABLE OUTPUT RELAY BOARD 1 RELAY ASSIGNMENTS STD SET PROGRAMMABLE RELAY 1 LOAD ON UPS PROGRAMMABLE RELAY 2 LOAD ON BYPASS PROGRAMMABLE RELAY 3 BATTERY DISCHARGE PROGRAMMABLE RELAY 4 LOW BATTERY WARNING CANCEL SAVE amp EXIT Figure 78 Programmable output relay board standard set page 2 PROGRAMMABLE OUTPUT RELAY BOARD 1 RELAY ASSIGNMENTS STD SET PROGRAMMABLE RELAY 5 OVERLOAD PROGRAMMABLE RELAY 6 AMBIENT OVER TEMP PROGRAMMABLE RELAY 7 SYS SUMMARY ALARM PREV SAVE amp EXIT 54 Operation If the Operator selects USER DEFINED from the RELAY ASSIGNMENTS screen the following screen will come up Figure 79 Programmable output relay board user defined PROGRAMMABLE OUTPUT RELAY BOARD 1 RELAY ASSIGNMENTS USER DEFINED PROGRAMMABLE RELAY 1 PROGRAMMABLE RELAY 5 PROGRAMMABLE RELAY 2 PROGRAMMABLE RELAY 6 PROGRAMMABLE RELAY 3 PROGRAMMABLE RELAY 7 PROGRAMMABLE RELAY 4 PROGRAMMABLE RELAY 8 CANCEL SAVE amp EXIT All User Defined relays are programmable NOTE Alarms have a separately programmable fun
32. status event log status history status and system settings The modem can also be configured to dial out two different telephone numbers a primary and a backup number as a result of a significant UPS event The selection of dial out events is programmable by the Operator 11 Network Interface Card NIC This option provides internal hardware and software to communicate via SNMP and HTTP to any I P based Ethernet network Connection to the network is made by a 10 baseT Ethernet cable provided by the user Theory of Operation 2 0 THEORY OF OPERATION 2 1 2 1 1 General Component Description The UPS system includes all of the equipment necessary to continuously provide computer grade AC power to a critical load even when there is an interruption of the utility line power It consists of the UPS modules and a back up battery plant Refer to Figure 2 UPS Module The UPS module consists of system controls a rectifier charger an inverter protective devices and other accessories System Controls The system control logic automatically manages critical bus operation and monitors performance of the UPS module Microprocessor technology and dedicated firmware provide advanced logic control and a comprehensive display of information The UPS module status is displayed locally Optional ports permit communicating with external devices Rectifier Charger The rectifier charger converts utility power from AC to DC to charge
33. system status and historical information You can place the call from either a remote terminal or a personal computer with a communications program Follow the instructions for your terminal or your communications program to call the UPS See Options Manual for details Once connected the UPS will respond to your specific requests for infor mation See Table 8 For example to see a copy of information on the active status reports enter the command SR and press ENTER The Npower UPS will send the data which will be displayed on your screen Please note that the data on the screen is like a snapshot the status of the UPS at the moment you requested the information The information sent remotely is not updated although you can repeat the process at intervals to request the present information Some screens contain data that you may wish to import into a spreadsheet for further calculations To put this data into a usable format use the screen capture feature of your communications software or a separate screen capture program to save all or part of the data to disk Hint If you save the file with an extension of txt 1t can then be imported into a spreadsheet program and converted to work sheet format To terminate your connection to the Npower type Quit and press Enter The UPS will hang up its modem and await your next call Dial Out Pager The Dial Out Pager requires the modem option to be installed It work
34. the battery and provide the DC input to the inverter Its design limits reflected harmonic current distortion to source power and provides low ripple DC power for charging batteries Inverter The inverter converts DC power into the precise AC power required to supply a sensitive critical load The inverter converts DC power into a pulse width modulated PWM that is easily fil tered into a clean sine wave output The PWM also minimizes the harmonic voltage distortion caused by typical switching power supplies and other nonlinear load components used in computers and related electronics Static Bypass Switch The static solid state bypass switch immediately transfers the load from the inverter to the bypass AC power source in the event of a severe overload on the system or a failure within the UPS This transfer takes place without any interruption of the power supplied to the load The system includes redundant circuits to detect and isolate shorted SCRs in the static switch Bypass Circuit The bypass circuit consists of switches and associated synchronizing and control cir cuitry to transfer the load to from the bypass source Battery System The battery is used as the alternate source of power to supply DC power to the inverter if the AC sup ply voltage is outside the acceptable range The battery supplies power to the inverter until the utility power is restored or until an alternate power source is available If AC source power is not res
35. the end of the line Pressing SELECT one more time will return the previous screen Figure 56 Auto dial screen Consult the owner s manual for the external modem for help in setting the initializing string for this modem Next the Operator can change the setting for the maximum baud rate by highlighting MAX BAUD RATE and pressing SELECT A screen will appear allowing the Operator to select 2400 or 9600 From the Auto Dial screen the Operator can access the second page by bracketing NEXT and press ing SELECT This action will bring up the following screen Figure 58 Auto dial screen page 2 AUTO DIAL MODEM HEALTH CHECK EVERYDAY AUTO DIAL IN YES AUTO DIAL OUT YES PAGER NO The settings for Modem Health Check Auto Dial In and Auto Dial Out can be changed by highlight ing the item and pressing SELECT which will bring up the appropriate screen To enable the pager and configure settings highlight PAGER and press SELECT The following screen will come up Figure 59 Pager support configuration PAGER SUPPORT CONFIGURATION PAGER ENABLED PAGER NUMBER PAGER PIN 8773886786 A password is required to enter a pager number and change the pager pin number See Figure 48 and Section 3 2 Security Access and Passwords Press SELECT will return the Operator to the Communications Options Screen See Figure 55 To go to the second page of the Communications Options Screen bracket NEXT and press SELECT The following screen wil
36. transferring the load to an alternative power source Many fault conditions can only be resolved through Operator intervention or service by an LGS technician A fault condition must be valid for a certain amount of time before it is recognized as an active fault This prevents spurious signals from causing false fault detection and unnecessary state changes All fault occurrences are time stamped and recorded in the Event Log for later analysis and sent to the Operator display Fault Messages Fault messages are displayed in reverse video as compared with alarm messages which are displayed in regular video The following faults are detected by Rectifier DSP Battery Overcharge e Battery Fuse Fail Battery Low Transfer DC Overvoltage Transient Input Phase Rotation Error Rectifier Fuse Fail Rectifier Drive 1 Fail Rectifier Drive 2 Fail Trap Fuse Fail Delta WYE Current Imbalance The following faults are detected by Inverter DSP e Bypass Frequency Error Bypass Overload Shutdown e Bypass Phase Rotation Error IDC Peak IGBT Drive Fail Inverter Overload Transfer Inverter Fuse Fail Output Overvoltage Transfer Output Undervoltage Transfer SBS SCR Open SBS SCR Shorted Inverter current Limit Transfer Inverter DC Offset 71 Operation The following faults are detected by the UPS controls Corrective actions where possible are auto matic Active Filter Fail
37. used in Liebert Battery Cabinets Consult the battery manufacturer s manual for specific information about equalize charging 98 Maintenance The equalizing charge time period is adjustable from zero to 72 hours and can be initiated automati cally or manually Refer to Battery Equalizer on page 59 Table 9 Battery voltage record Float Voltage Nominal Voltage Date Volts DC Volts DC Ambient Temp F To be completed by Liebert Global Services customer engineer at time of start up 4 2 5 Torque Requirements All electrical connections must be tight The next Table provides the torque values for the connections in the UPS Use these values unless the equipment is labeled otherwise NOTE Refer to battery manufacturer s manual for the proper torque values required for the battery See battery manufacturer s Website Table 10 Circuit breakers with compression lugs for power wiring Current Rating Lb in N m 400 1200 Amps 300 34 Table 11 Terminal block with compression lugs for control wiring AWG Wire Size or Range Lb in N m 22 14 3 5 to 5 3 0 4 to 0 6 99 Maintenance 4 3 4 4 4 5 4 6 Detecting Trouble It is important that the operator check the instrument readings if abnormal equipment performance is suspected Any metered value that differs appreciably from normal could mean an impending mal
38. 00 rated load for 15 minutes Alarm messages that indicate battery status are Battery Discharge Low Battery and Battery Shut down The voltage limits for these alarms are displayed on the UPS module Alarm Limit Settings screen These limits were selected for your installation by Liebert Global Services during initial start up Figure 114Utility fail load on battery MIMIC DISPLAY BYPASS INPUT FAULTS Liebert 93 Operation 3 6 5 Automatic Operations The Npower UPS is designed to function while attended or unattended by an Operator The system control logic monitors the performance of the UPS the availability of power sources and the current required by the critical load Automatic UPS operations are described in the following sections Overloads The UPS system is capable of sustaining full output voltage for overload conditions that remain within or under the current versus time curve of system overload capacity For high current demands of short duration momentary overloads the critical load is supplied simul taneously by both the UPS system and the bypass line Whenever the critical load requires more than 200 of the capacity of the module the bypass line will supply up to 6000 amperes for one half cycle If an overload condition exceeds the UPS system overload capacity or the capacity of the modules online the UPS system init
39. 00 assignment 0 0 e cece 53 Relay assi nmMent3s A ea on a sae We A ieee SRE Bee Pa a EN acetate ans eater eg 53 Programmable output relay board standard set 0 cece ete eee 54 Programmable output relay board standard set page 2 0 ccc cee eee 54 Programmable output relay board user defined 0 eee eens 54 List of alarm faults screen 55 Manual transfer retransfer screen when transfer is allowed ooooooooo o 56 Manual transfer retransfer screen when transfer is not allowed o 57 Battery management sere 57 Battery test ser eens a A es ae EE Soe ev a es RE EAA RE es 57 Automati test screen A A ae a kia ee ena ea ed 58 Set battery cycle screen 59 Set battery duration screen 0 0 eee eee nnn e tence en nee 59 Battery equalizer STE AA A laa eh A A A ALG end aa En tbe Po 60 AUTO SCHEIN aaa E AA ld wigs base pe AI A Nome ee het hd with ek RA T 60 Manual screens 60 Equalize time period screen 60 Equalize voltage screen 61 Battery temperature compensation charge sereen o oooooooooorrrrr eens 61 Battery temperature compensation enable disable screen 0 0 00 eee eee 61 Battery temperature compensation charge screen page 2 0c e eee ee eee ees 62 Battery temp compensation edit screen 62 Battery cycle monitor screen 62 Battery cycle monitor screen page Ll 63 0 30 seconds discharge cycles eee eee eee A nn
40. 108System status screen page 4 SYSTEM STATUS AVERAGE LOAD OVERLOAD CONDITIONS UNSUCCESSFUL AUTO REXFERS AUX TEMP SIGN OFF DATE 10 30 02 PREV EXIT STATUS DEFINITIONS AND CONDITIONS Accumulated Installed Hours 69 Operation Once the UPS Sign Off is acknowledged it is stamped with RTC time and date This step must be performed by LGS personnel The software will keep track of the elapsed hours from that point on by subtracting the current time and date from the sign off time and date Accumulated Operating Hours on UPS With output contactor closed and load KVA greater than 1 software accumulates operating hours that the load is supported by UPS Accumulated Operating Hours on Bypass With bypass contactor closed and load KVA greater than 1 software accumulates operating hours that the load is supported by Bypass Accumulated Backup Hours With Battery breaker closed and battery discharge current greater than 2 rated Ibatt software accumulates Hours or fraction of hours i e 0 2 1 9 that the load is supported by the battery system Ibatt gt 0 02 Rated KW 0 96 Vbatt Accumulated of Brown Outs An Input Undervoltage condition must exist for more than 5 minutes During this time Input Line Fail condition must not be active Once a count is made allow 30 minutes to re arm the counter Accumulated of Manual Transfers User initiated and successful transfers to bypass commanded f
41. 52 2572220 Corporation All names referred to are trademarks Fax 852 28029250 or registered trademarks of their respective owners SL 24534_REV1_11 06 Emerson Network Power The global leader in enabling Business Critical Continuity EmersonNetworkPower com AC Power Hi Embedded Computing I Outside Plant HI Racks amp Integrated Cabinets HI Connectivity MI Embedded Power HI Power Switching amp Controls I Services Mi DC Power HI Monitoring I Precision Cooling I Surge Protection Business Critical Continuity Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co 2006 Emerson Electric Co
42. ARTUP SHUTDOWN This action will display the STARTUP SHUTDOWN screen From there highlight USER SHUTDOWN and press SELECT The following figure will appear Figure 30 User shutdown screen USER SHUTDOWN INVERTER OFF CRITICAL LOAD SHUTDOWN EXIT The Operator can invoke two types of shutdowns from this interface screen Transfer Load Inverter Off Selecting this option transfers the load to Bypass and turns off the Rectifier and Inverter Critical Load Shutdown Selecting this option enables a total system shutdown for purposes of servicing or repair The critical load will be dropped once the command is acknowledged by the controls Once the Operator has initiated this command a final warning message will be issued that The UPS load will be dumped if you continue If accepted Continue the system will shut down When Operator selects TRANSFER LOAD INVERTER OFF the MANUAL TRANSFER RETRANSFER screen is displayed This allows the Operator to transfer the critical load in and out of the static switch bypass This screen can be accessed only when the rotary switch is in Normal posi tion The screen is accessed from the MAIN MENU Figure 31 Manual transfer retransfer screen when transfer is allowed MANUAL TRANSFER RETRANSFER BYPASS OK INVERTER OK INT BYP SWITCH NORMAL EXT MAINT SWITCH ON LINE INVERTER LAG 1 DEGREE TRANSFER TO BYPASS EXIT Figure 32 Manual transfer retransfer screen when t
43. C current limiting circuit battery equalize charge circuit DC filter battery charge current limiting circuit and bridge rectifiers Operation The rectifier charger converts the AC input power to DC power This conversion is accomplished by 3 phase bridge rectifiers using SCRs All phases are individually fused For all modules reflected input current THD is less than 30 at full load which may be reduced to less than 10 with optional fil ter The filtered output of the rectifier charger provides regulated DC power to drive the inverter and charge the battery Input The input is sized to allow enough current to recharge the battery and supply a full rated load at the same time Input Current Limit AC input current sensing transformers CTs are used to measure current levels Control circuitry monitors the CTs and restricts the AC current to less than 125 of the full input current rating by reducing the battery charging voltage This current limit is adjustable from 100 to 125 of the system capacity measured in AMPS with the default setting at 125 maximum AMPS An external dry contact closure field supplied activates a reduced second level of the battery charge current limiting circuit for use with a back up generator Input Current Limit Second Level A second level of input current limit is initiated by an external contact closure field supplied for use with back up generator and is adjustable from 85 to 100 facto
44. E FILTER SETTINGS NEXT PREV CANCEL SAVE amp EXIT 48 Operation Highlighting 10 PASSIVE FILTER SETTINGS will bring up the following Operator interactive screen Figure 66 10 Passive filter settings screen 10 PASSIVE FILTER SETTINGS FILTER DISCONNECT LEVEL 0 FILTER PREFERRED STATE OPEN 10 PASSIVE FILTER ENABLED Figure 67 User settings screen page 6 USER SETTINGS AUTO RESTART SETTING SYSTEM ACTIVE FILTER ENABLE ENABLED TEMPERATURE BATT CB TRIP NO CHANGE PASSWORD INTERRUPTED TRANSFER ENABLE DISABLE PREV CANCEL SAVE amp EXIT Factory Settings Figure 68 Factory settings screen FACTORY SETTINGS OUTPUT AC VOLTS AN 120 OUTPUT AC VOLTS BN 120 OUTPUT AC VOLTS CN 120 OUTPUT OF UF 0 5 INVERTER DC OFFSET PHASE A NEXT CANCEL SAVE 8 EXIT 49 Operation Figure 69 Factory settings screen page 2 FACTORY SETTINGS INVERTER DC OFFSET PHASE B INVERTER DC OFFSET PHASE C INPUT LIMIT WITH TRAP 164 1 INPUT LIMIT WITHOUT TRAP 190 8 INPUT LIMIT ON GENERATOR 100 NEXT PREV CANCEL SAVE amp EXIT Figure 70 Factory settings screen page 3 FACTORY SETTINGS INPUT PID LOOP ON GENERATOR DELAYED RESTART 10 BYPASS OUTPUT PHASING 30 PREV CANCEL SAVE 8 EXIT Alarm Mask The Alarm Mask sets parameters for all alarms that affect the UPS and output channels The pro grammable attributes are described below The letters L D F and E in Figure 71 refer to th
45. E MONITOR SUMMARY PAGE CLEAR BCM YES NO CLEAR SUMMARY YES NO PREV EXIT DISCHARGE CYCLES The Discharge Cycles Screens are accessed from the Battery Cycle Monitor Screen Each of the four buckets will have a format as illustrated in Figure 99 showing the 0 30 seconds dis charge cycles The ID numbers are stamped in the order of occurrence For example assume that the following four discharge cycles have occurred 1 On 03 09 01 there was discharge cycle that lasted 25 seconds 2 On 04 12 01 there was discharge cycle that lasted 96 seconds 3 On 04 25 01 there was discharge cycle that lasted 42 seconds 4 On 04 26 01 there was discharge cycle that lasted 21 seconds The 0 30 bucket should display event IDs 1 and 4 with 4 shown as the most recent discharge event The 31 90 bucket displays event 3 and the 91 240 bucket displays event 2 The maximum field length for seconds is 99999 5 digits which equates to 27 78 hours DC Bus volts has xxx 8 digits FORMAT Maximum discharge 1 is displayed in xx x format i e 65 5 99 9 max when the discharge current is 6553 unsigned integer 10 for each cycle The field length for KWH is 5 When less than 1000 KWH it is displayed in xxx x format i e 340 8 999 9 max If it exceeds 999 9 the decimal point is removed and the format becomes xxxx The maximum displayed KWH is 6558 for each cycle The displayed range for battery temperature that can be displayed is from 0
46. ECT will bring up the following screen allowing the Operator to decide whether or not the input trap filter should be disconnected at light loads to prevent a leading power factor at the input For more information see Input Trap Filter in the options manual Figure 51 10 passive filter settings screen 10 PASSIVE FILTER SETTINGS FILTER DISCONNECT LEVEL 0 FILTER PREFERRED STATE CLOSED 10 PASSIVE FILTER CONTACTOR DISABLE 43 Operation Figure 52 Options screen page 2 OPTIONS 12 PULSE RECTIFIER 6 PULSE BATTERY GND FAULT NO GREEN MACHINE NO FREQUENCY CONVERTER NO LINE DROP COMPENSATION NO NEXT PREV EXIT Figure 53 Options screen page 3 OPTIONS ALTERNATE POWER POLE FAN NO AUX TEMP NO SFA NO MOTORIZED BATT BREAKER MANUAL BATT CELL MONITOR NO NEXT PREV EXIT Figure 54 Options screen page 4 OPTIONS EXTERNAL MAINT BYPASS NO PREV EXIT 44 Operation Communication Options Communication options are the various options that enable the operator to view data from remote locations and to program the type of data to be viewed For detailed information see Section 3 5 Communication Interfaces The communication options screens can be accessed from the third page of the System Settings screen See Figure 47 Figure 55 Communication options Screen page 1 COMMUNICATION OPTIONS MODEM DISABLED PROGRAMMABLE RELAY 1 YES PROGRAMMABLE RELAY 2 YES
47. Event Log and History Log reports can be displayed on a remote terminal For more information see 3 5 Communication Interfaces 34 Operation Event Log The Event Log screen displays the faults alarms and status messages Every message will have a time and date stamp The Event Log is a sequence of messages or events captured in individual frames See the following section on HISTORY LOGS for more information about frames The following three screens show the last 3 in a series of 20 messages Notice that 20 messages have accumulated in this example and that marker moves from right to left as earlier messages are viewed The number of events prior to the alarm are displayed by an arrow pointing to the left and the number of events following the alarm is illustrated by an arrow pointing to the right The maxi mum number of events that can be recorded is 512 events To view a previous event highlight PREV and press SELECT Figure 34 Event log report screen showing most recent event EVENT LOG TOTAL 20 MESSAGE SYS TIME SET BY OP gt 0 TYPE ALARM lt 19 INITIATED BY MICRO MONITOR EV NEXT EXIT 02 24 21 6 10 00 Figure 35 Event log report screen showing previous event EVENT LOG TOTAL 20 MESSAGE UPSC MM COMMUNICATION FAIL gt 1 TYPE ALARM lt 18 INITIATED BY MICRO MONITOR DAAM NEXT EXIT 02 23 21 6 10 00 Figure 36 Event log report screen showing previous event EVENT LOG TOTAL 20
48. Hi AC Power For Business Critical Continuity Npower UPS Operation amp Maintenance Manual 30 130kVA 60Hz Single Module System A W Liebert EMERSON Network Power TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS 00 0c eee ee eee ee eee eee ee eee eee eee ee ee eee 1 OVERVIEW OF MANUAL ond ie ee SS AA PE Oe SO 2 1 0 INTRODUCTION oe save aca ace Seated oceans a ta caen 3 1 1 Systemi Descriptions sec 55d ae a eran a We OS A RRA Mane a ae as 3 LIL FRelia bility cas biter kite thi sree pinn Ait aeaa ol TE odes teu a udecs Gg keen EE E 4 1124 Versatility a each he Ls Sh or la a dos 4 1 2 Safety Precautions A HLS He nee ES a need ack OE Cas Dh ne ne 4 1 3 Modes Of Operation neras jAks A ee ES al Boe PE Be 5 1 31 Normal Load On URS uta A A eee on Skea Sale sessed is lve Nea ws wean oan bela ghee ade aes 5 13 2 Input Power Failure a A ES ee GS a Gi LS RRS aS 5 1 3 3 RECHAV A ON in as GEES oh Beno WGN OR EE IRR AE SS BENE So RE ias 5 kod A edo ee Meio O Oeil Nan ces oe ee NA oat ai 6 1 35 Bypass internal aeeoo Gast as ete Soi ae ea we So Si n SI as 6 1 3 6 External Maintenance Bypass 6 3 TO Battery eo e td o dla es Fata a A fa Ad Moet Ne ci 6 1 4 Operator Controls ii A A bh Bich ea A aia 7 1 5 ptos sra sia id o do A a a a e e a EER e Ok AE 7 2 0 THEORY OF OPERATION oeno a a el wee a a 8 2 1 General Component Description 0 0 cc eee teen eens 8 2 Viale WPS Module e is e tnt c
49. MOKE when near batteries DO NOT cause flame or spark in battery area Discharge static electricity from body before touching batteries by first touching a grounded metal surface After replacing battery jars in a battery cabinet replace the retaining straps that hold the jars in place on the shelves This will limit accidental movement of the jars and connectors should the cabinet ever need to be repositioned or relocated Regular maintenance of the battery module is an absolute necessity Periodic inspections of battery and terminal voltages specific gravity and connection resistance should be made Strictly follow the procedures outlined in the battery manufacturer s manual See battery manufacturer s web site Valve regulated lead acid batteries do require periodic maintenance Although they do not require maintenance of electrolyte levels visual inspections and checks of battery voltage and connection resistance should be made NOTE Do not use cleaners on the batteries Solvents can make the battery cases brittle Use only a dry cloth or a cloth moistened in water Since individual battery characteristics are not identical and may change over time the UPS module is equipped with circuitry to equalize battery cell voltages This circuit temporarily increases charg ing voltage to maintain flooded type battery cells at full capacity NOTE Do not use equalize charging with valve regulated lead acid batteries such as those
50. N is an explanation of the major circuit groups of the Npower UPS This section is for individuals who want to know both the basics and the specifics of each major component The text explains how the UPS handles electrical disturbances and interruptions Section 3 OPERATION is written for facility personnel responsible for the operation of the system It details the procedures required to start up the system to transfer the load between the available sources and to shut down the system Both manual and automatic operations are described Operator controls and displays including the solid state liquid crystal display LCD screen are illustrated and explained for the UPS Module Section 4 MAINTENANCE lists routine maintenance checks and helps the Operator pinpoint and quickly resolve problems if they arise If you require assistance for any reason call Liebert Global Services at 1 800 LIEBERT For best ser vice please have the following information available Part Numbers Serial Numbers kVA Rating Date Purchased Date Installed Location Input Voltage Output Voltage Battery Reserve Time Introduction 1 0 INTRODUCTION 1 1 System Description The role of the UPS system is to supply uninterruptible clean power to the critical load It maintains a full voltage low distortion output even if the utility source power sags or becomes distorted If there is an outage of the
51. Phase B Alarm NO YES NO YES With the load on UPS Phase A output kVA or kW or RMS current has exceeded 105 of the nominal per phase rating The UPS will begin sending the time remaining until a transfer or shutdown will occur per the Overload vs Time Curve The alarm condition will clear when the overload returns to below the nominal rating 82 Operation Table 7 Alarms functions and corrective actions continued Actual Alarm fault Name Displayed On Front Panel Inv Ovld Phase C Description of Alarm Fault Inverter Overload Phase C Fault Or Alarm Alarm Latch Mask NO Dial Mask YES Freeze Mask NO Event Log Mask YES Meaning and Corrective Action s With the load on UPS PhaseB output KVA or KW or RMS current has exceeded 105 of the nominal per phase rating The UPS will begin sending the time remaining until a transfer or shutdown will occur per the Overload vs Time Curve The alarm condition will clear when the overload returns to below the nominal rating Low Pwr Factor Warn Low Power Factor Warning Alarm NO YES NO YES On any output phase that is supplying at least 15 of its rated KVA the measured output power factor is below 0 50 leading or lagging Pulse Paralleling Pulse Parallel Activated Alarm NO YES NO YES With the load being supplied by the inverter the measured lo
52. SE RR need a a Ii 100 Recommended Test Equipment 100 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Figure 37 Figure 38 Figure 39 Figure 40 Figure 41 Figure 42 Figure 43 Figure 44 Figure 45 Figure 46 Figure 47 Figure 48 Figure 49 FIGURES UPS controls and display screen with example of the monitor mimic screen 6 80 kVA UPS outside and inside VIeWS o o oooooorroorr eee een eee nes 14 Operator control panel is 3 2 20 2 dec A Lae arte ieee andl aes oA Be ie RAS 15 Navigation buttons ii ie hore lt oes Goh Slaten eects sees tc id gos Goad ake we lees al hee Gs 16 Rotary Witch teca td aude a Walls exe atte ats do wider nota 17 Configuration Screen sve bese eae a Mace lan AE oo et Res ee a 18 User settings screen page bh 18 Menu treening ito e Like fee princes whe eg Weegee Othe ee ea and td Shae rat 19 Mal menu SM Withee Ss dees ee naa ye tai BS ey needa Wa Ryne mdi wa oli 21 Monitor mimic display screen example normal power floW o oooooooooooo 21 Mimic display screen example utility fall o o o oooooooooooooooo ooo 22 Mimic displa
53. T TEST TIME 01 02 03 BATT TEST DATE 07 13 00 CYCLE 2 DURATION 30 EXIT 58 Operation To enable the Auto Battery Self Test Select Auto Test Enable from the Battery Test screen Next set the Date and Time at which the first test will be performed Set the Test Cycle period in weeks The range is 2 9 weeks and the default is 2 weeks Finally set the Test Duration time in seconds according to the table above The range is 30 900 seconds and the default is 60 seconds Use the UP DOWN navigation buttons to change the cursor position when setting battery parameters Figure 86 Set battery cycle screen BATTERY CYCLE MIN 2 MAX 9 Figure 87 Set battery duration screen BATTERY DURATION MIN 30 MAX 900 030 SECONDS Battery Equalizer In order to prolong battery life the Npower system provides a User programmable setting after each battery discharge The equalize setpoint is typically set to a higher float voltage When the input utility power is interrupted the battery supplies DC power to the inverter so there is no interruption of power to the critical load When the AC input power is restored the battery equal ize recharging circuit can be activated automatically or manually to increase the rectifier charger out put voltage to recharge the battery The battery equalize circuit may also be manually activated at any time during normal float constant voltage operation
54. TIME REMAINING CANCEL SAVE amp EXIT Battery Test The Battery Test screen allows the Operator to select between Auto Test and Manual Test Figure 84 Battery test screen BATTERY TEST AUTO TEST DISABLE MANUAL TEST LAST BATTERY TEST BATTERY TEST PASSED EXIT The auto battery self test can be enabled disabled from the Battery Test Screen It is performed unattended by programming Time Date Test Cycle and Test Duration in Battery Self Test Screen Selecting MANUAL TEST from the Battery Test screen will perform an Operator initiated test 57 Operation The following conditions and features apply to either Auto or Manual Mode If you go to the battery screen it will indicate Battery Test in Progress When the test is com plete the indication Last Battery Test will either say Battery Test Passed or Battery Test Failed One of two alarms are logged in the event log screen Battery Test Passed or Battery Test Failed If failed there will be accompanying alarm messages in the event log to describe the rea son for failure 1 e Battery Recharging Battery Test Failed message is also latched in the active alarm fault window of the Mimic screen There are a number of pre conditions which must exist before it is possible to start a battery test The Battery CB Input and Output contactors must all be closed All phases of Input and Bypass volts must be within defin
55. The equalizing time can be adjusted from 0 to 72 hours The default setting is 0 A setting of 0 is interpreted as if the feature were disabled The Battery Equalize screen The battery equalize screen lets the operator change the battery equalize recharging mode from manual to automatic and to observe or change the equalize time To access this screen go to the MAIN MENU highlight BATTERY MANAGEMENT and press SELECT This brings up the Battery Management screen Highlight BATTERY EQUALIZER and press SELECT The Battery Equalizer Screen Figure 88 will appear CAUTION The manufacturers of the valve regulated batteries supplied with Liebert s standard battery cabinets recommend that when first installed the batteries be equalize charged After that initial equalize charge they recommend no further equalize charging for their batteries Other manufacturers may have different recommendations for their products Consult the battery manufacturer s manual for specific information about equalize charging 59 Operation Figure 88 Battery equalizer screen BATTERY EQUALIZER AUTO DISABLE MANUAL EQUALIZE TIME PERIOD 0 EQUALIZE VOLTAGE 540 SAVE EXIT From the Battery Equalizer Screen you can choose one of the four options on the screen The screens for these options are illustrated below Figure 89 Auto screen AUTO ENABLED DISABLED AUTO MODE When the battery recharge control logic is in the AUTO MODE the UPS batte
56. a arate wt ah Seles Saale eRe a ca KO ad Pe aud ai 8 2AGQ Baterista a AA darte 8 2 2 Detailed Component Descriptions 0 000 0c eee eens 9 D2 2 1 AWCOntrol sec A baat A ds tried fayette A chara saath eae 9 2222 Rectifrer Car cer go So oho dt Behe aa Re a RA Bae OBE 10 2 2 3 Battery Charam Girc itse ieee sere es A WS er wld esis ewes ett SEE ek 10 2 24 IN A A O RE eet aN 11 2 2 5 Static Bypass io witch A a a ae 12 3 0 OPERATION Coi A A on be ab a a ec 14 3 1 Operator Controls AA A AA AA AAA 14 3 1 1 Operator Control Panel ua A A Beh OO Bed tt 16 g2 Navigation Buttons ceived deg a a AN 8 Bin a end ie BBS BEE EI 16 IS Rotary SWITCH ooh ce laa sO Bk BET Nae RU dad Ae A Nad A ee 17 3 2 Security Access and Passwords 18 3 3 Display Screens and Procedures 19 331 Mimie Display Screen mesi a a tt Dd a dal Eta 21 eee Startup st ia te Be ale ids a td co ate if 27 A A O Peelers Bie ass 33 39 47 Status Reports it ii ida RTS een dl oe wo Ad ad idos 34 3 3 5 Configuration Screens asebi regan cc ce ee eee cece eee eee e teen ne nes 38 3 96 Manual Transfer ir a aan aioe dlls ans bee Ada techno dele wana dle handed 56 3 3 7 Battery Management dd bad 57 3 98 Auto Restart nati A E a A pd a 66 3 3 9 System Status Mont io wee a A 68 3 4 3 5 3 6 4 0 4 1 4 2 4 3 4 4 4 5 4 6 Faults Alarms Status 2 5 ccc cee cee eee edb a eb eee e Hew ede bee eb be ee eas 71 SAL EAS A A eo AE BHT endo a
57. able the Rectifier Input RIB circuit breaker external to the UPS module is open or the Control Power is OFF If power is available and a display is blank contact Liebert Global Services 1 800 Liebert or 1 800 543 2378 20 Operation Main Menu Screen The Main Menu contains the primary menu selections that monitor and control the operation of the UPS To access one of these screens use the NAVIGATIONAL BUTTONS beneath the screen First press the UP or DOWN button until the desired screen is highlighted Then press the SELECT button From any screen pushing the Escape button once will return you to the Mimic Screen Figure 9 Main menu screen 3 3 1 MAIN MENU MIMIC DISPLAY MANUAL TRANSFER STARTUP SHUTDOWN BATTERY MANAGEMENT STATUS REPORTS CONFIGURATION Mimic Display Screen From Main Menu move the highlighted cursor to MIMIC DISPLAY and press the Select button This brings up the Mimic Display Screen The Mimic Display screen is the default screen on the Operator Display It is a simplified block dia gram showing an overall view of the power flow through the UPS system Solid lines indicate power flow white lines with thin black edges indicate that power is not flowing in that area The following examples illustrate power flow under different conditions Figure 10 Monitor mimic display screen example normal power flow MIMIC DISPLAY coe ru Liebert BATTERY SYS STATUS
58. ad 1 C IMBS INV Battery y Rect Rectifier Input i Operation Figure 28 External maintenance bypass switch single input UPS 1 B Critical load UPS Input S1 A 1 C IMBS i SBS i The table below summarizes the External Maintenance Bypass switch positions and actions Table 3 External maintenance bypass switch positions and actions Switch position S1 A S1 B S1 C AUX Maintenance Service Open Closed Open Open Test Bypass Closed Closed Open Open On Line Transition Closed Closed Closed Open On Line Normal Closed Open Closed Closed When the External Maintenance Bypass switch is in Bypass or Maintenance position the UPSC will assert the bypass contactor close signal and the output contactor open signal It will also turn on the SBS Automatic Retransfer operations will be disabled If the External Maintenance Bypass switch rotates from the Bypass or Maintenance to the Normal position then the UPSC will keep the bypass in the ON state thus keeping the critical bus powered via the bypass source The user will be able to issue a Manual Transfer to Inverter command pro vided the retransfer conditions are satisfied The user can also issue a shutdown or a start command If the External Maintenance Bypass switch rotates from the Normal to the Bypass or Maintenance position the UPSC will assert the b
59. ad current exceeds the auto Parallel Current Limit or the Pulse by Pulse Current Limit set point values If the Static Bypass is available the SBS supplies supplemental power If at the end of 10 cycles the load current has not returned to below 105 the Static Bypass will be left on and the inverter will be turned off If the over current has cleared the Inverter will be left on and the SBS will be turned off Auto rexfer failed Auto Retransfer Failed Alarm YES YES NO YES After performing a recoverable transfer to bypass with Auto Rexfer enabled the Auto Rexfer time out default 5minutes has elapsed before retransfer could be performed A manual retransfer must be performed which will then clear the lockout and zero the retransfer hour counter If the manual transfer is inhibited the Inverter may be latched off due to another fault Contact Liebert Global Services Excessive Auto Rexfer Excessive Auto Retransfer Alarm YES YES NO YES The UPS has determined that the actual number of Auto Retransfers in the past hour has exceeded the permitted maximum user settable default 5 This alarm should not be issued if auto retransfers are disabled by setting the maximum attempts to 0 A manual retransfer must be performed which will then clear the lockout and zero the retransfer hour counter Aux Power Fail Aux Power Fail Alarm NO YES NO YES If the unit
60. age will appear stating UPS OPERATION CANNOT BE PER FORMED Although no further operator interaction is required the Operator has the option to abort the Auto sequence Once the Operator has manually closed the Battery Breaker the UPS automatically becomes fully operational at which point the Mimic Display Screen is displayed showing Normal Power Flow See Figure 10 28 Operation Manual Startup On occasion a service technician may wish to start the UPS manually while performing diagnostic testing The manual startup like the auto startup requires that the Rotary Switch be in the NOR MAL position To start the system manually highlight MANUAL STARTUP and press the SELECT button on the navigation bar This action brings up the MIMIC DISPLAY screen prompting the Operator to close the Static Switch contactors Figure 24 Manual startup screen close static switch contactors screen MIMIC DISPLAY BYPASS SS RECT Mi 0 Liebert Press OK to close the SS contactors turning on the Static Switch Press SKIP only to proceed without closing the Static Switch contactors Either selection brings up the screen enabling modification of input current limit Figure 25 Target and ramp values INPUT MODIFY CURRENT LIMIT TARGET AND RAMP VALUES TARGET A 13 RAMP S 10 i skr Press SKIP to proceed or OK to change values
61. an Power pole cause an equipment over temperature 2 Fail Fano Fail am NO PES NO YES condition that would shut down the UPS Module Check the Fans for proper operation Contact Liebert Global Services to replace a fan A fault in the designated Fan motor has occurred This condition only causes an alarm but if not promptly corrected it could Pwr pole Fan Power pole cause an equipment over temperature 3 Fail Fang Fail am NO YES N YES condition that would shut down the UPS Module Check the Fans for proper operation Contact Liebert Global Services to replace a fan 84 Operation Table 7 Alarms functions and corrective actions continued Actual Alarm fault Name Displayed Description Fault On Front of Alarm Or Latch Dial Freeze Event Log Panel Fault Alarm Mask Mask Mask Mask Meaning and Corrective Action s A fault in the designated Fan motor has occurred This condition only causes an alarm but if not promptly corrected it could System Fan System Fan cause an equipment over temperature Fail Fail Alarma A TESE NO YES condition that would shut down the UPS Module Check the Fans for proper operation Contact Liebert Global Services to replace a fan During start up the EPO switch is sensed as being activated Startup is inhibited until the EPO Latched EPO Latched Alarm NO NO NO YES alarm is cleared Clear the latched EPO via the push butt
62. arm Status Panel SiteScan The SiteScan port sends UPS system information to a Liebert SiteScan Central Monitoring System UPS operation environmental control systems and facility security can all be monitored from a sin gle location 91 Operation 3 5 5 3 6 3 6 1 Setting Up External Communication Devices All external communication devices including the modem are optional equipment Connections to communication ports are made by wiring cables to terminal boards Connection points are shown on the Control Wiring Interconnect Diagram in the Installation Manual Contact Liebert Global Services for assistance when attaching an external device to your UPS system Any terminal that accepts the standard 7 bit ASCII codes and conforms to the data link requirements can be used to interface with the Npower UPS If a printer is used the terminal must support it The UPS does not send or receive any printer control commands Data link requirements are Asynchronous RS 232 communication Terminals may be configured as DTE or DCE e Baud Rate Modem 1200 or 2400 Terminal 9600 only e Data Bits 8 Stop Bits 1 e Parity None Handshaking Not required e Full Duplex Modes Of Operation This section illustrates the flow of power through circuit breakers switches and UPS components dur ing various modes of operation The same modes of operation apply to all configurations of the Liebert Npower UPS Highlighted thick l
63. as ila a UI TA ha a Bla cas bla 71 BAD ALAS ec Serene che ah ett aetna Seek deta e hon tote a O Mak ho Nas Re tins 72 Aa WS LACUS ankn a e ashe aed tah ELIE schon e cel test E a Sd 88 Communication Interfaces 88 3 5 1 RS 232 Port Local Reporting Terminal 89 3 5 2 Worldwide Reporting 89 3 5 3 Remote Alarm Status Panel 91 A A O EEE NN 91 3 5 5 Setting Up External Communication Devices 000 oo 92 Mode OE Operation iS AA SA A Wed an Ss ead 92 3 6 1 Logado Bypass asses o e a ah a A Wale a eee as 92 3 0 2 WOK to Transitoria e a a as ea GAG i cee oY 92 3 6 3 Momentary Overloads 0 0 ce eee eee n eee e eens 93 3 6 4 Input Power Failure Load on Battery 0 0 00 0 ooo 93 3 6 5 Automatic Operations oeras ioeina eee eee eee e eee e een eee 94 MAINTENANCE ss ic seestctecedts O a E aca e 96 Dalety Precautions ii avs Sate Mee A DO ine nN BO A td Ae 96 Routine Maintenance 4 5 5 3 a8 a Beek se a Adee wae dite eae eM ae Dh 97 As A gt Record LOS feces deal sete A AAA Bi Albee ODER AS Alor ws GPA Splits aes 97 ADD AN PTEE SEs Spe Bs sah ute aah he sak I Aa e a ae fold Spohn O 97 42 35 Bathery Maintenance nus A E Ate Henle WA Gre awd 97 4 2 4 Battery Safety Precautions 000 00 eee een nee ees 98 42 5 Torque Requirements 99 Detection ESA aca Wee as 100 Reporting a Problem iia ea ate tr A Roe ares ate a ale wales dA SE are es es 100 Corrective AChHlONS vac 2 Asis teal tes ahh pes BRR ea
64. ated on the inside of the cabinet on the lower right side as you face the cabinet Turn the Rotary Switch to the Normal position For a Single Input unit close the upstream breaker so that power is applied to the UPS For Dual Input units close both the Input and Bypass line breakers so that power is applied to the Input of the UPS and the Bypass line At this time power will be applied to the load through the internal static bypass Figure 21 System ratings screen SYSTEM RATINGS KVA SYSTEM POWER FACTOR INPUT VOLTS OUTPUT VOLTS BYPASS VOLTS NEXT As soon as power is applied you will see the SYSTEM RATINGS screen Figure 21 These are the ratings of the unit that were programmed in at the factory Using the arrow keys highlight SAVE amp EXIT and push the SELECT button This will advance you to the USER SETTINGS screen The USER SETTINGS have been pre set at the factory However they may be customized for your site See 3 3 5 Configuration Screens for detail information on configuration screens You can change these configurations at any time Use the arrow keys to move the cursor to SAVE amp EXIT and push SELECT This will move you to the MIMIC screen that will look like Figure 22 You are now ready to follow the instructions for automatic start up see Auto Startup on page 28 Service technicians may alternately use the Manual Start Up procedure for troubleshooting purposes in Manual Startup on page 29 Figure 22 Mimic di
65. auto retransfer attempts Make adjustments to the UPS output voltage before performing a manual load transfer 3 1 2 Navigation Buttons The Navigation Buttons are located below the Display Screen Figure 4 Navigation buttons MAIN MENU MIMIC DISPLAY MANUAL TRANSFER STARTUP SHUTDOWN BATTERY MANAGEMENT STATUS REPORTS CONFIGURATION Liebert a ALARM ALARM RESET SILENCE ESCAPE s Operation The SELECT button is used to select a particular item from the options on the screen When you press this button the screen that 1s selected will be immediately displayed The UP and DOWN buttons are used to move the cursor around the screen in order to highlight appropriate selections The ALARM SILENCE button silences the audible alarm and discontinues the flashing of the alarm messages The ALARM RESET button clears a latching alarm after the alarm condition is corrected The ESCAPE button is used to exit the screen and return to the Mimic Display 3 1 3 Rotary Switch The Rotary Switch is located on the lower right side of the panel inside the cabinet This switch pro vides single point control of the UPS z NOTE Improper positioning of the rotary switch can result in unwanted actions Therefore it is important to read the complete instructions before using this switch and to follow Operator prompts on the display screen Figure 5 Rotary switch BYPASS JOZ rn S E R VI T C E
66. bypass source to carry the initial overload current If the overload clears before 10 cycles a load transfer to bypass is not made If the overload condition continues to exceed the inverter capacity the automatic transfer is made maintaining the load voltage within the specified limits Load Transfers Transfers to transfer or from retransfer the bypass may be performed automatically or manually in a make before break MBB sequence Manual load transfers and retransfers are initiated by the Operator from the UPS Control Panel Automatic transfers are initiated by the UPS system control logic when an overload is beyond the specified capabilities of the UPS inverter or when a fault occurs within the UPS module An auto matic retransfer is initiated if this function is enabled and if system conditions for a retransfer are present 12 Theory of Operation Transfer and Retransfer Conditions 1 Automatic Transfers to Bypass Critical bus conditions that will initiate an automatic transfer of the critical load from the UPS inverter output to the bypass source are a Output Overload overcurrent condition in excess of the current versus time overload capacity curve b Over Under Voltage OV UV critical bus voltage is outside the allowable tolerance c Inverter Inoperative inverter diagnostic circuitry senses an imminent inverter output OV UV condition d Battery discharged to the shutdown voltage e Inverter
67. can choose among the following three configurations for each of the two Programmable Relay Boards AS400 Standard Set User Defined The default configuration is User Defined To access the proper screen for configuring the Programmable Relay Boards 1 Navigate from the MAIN MENU to the CONFIGURATION screen 2 From the CONFIGURATION screen use the arrow keys to highlight CUSTOMER ALARM INTERFACE and press SELECT This action will bring up the following screen 52 Operation Figure 73 Customer alarm interface screen CUSTOMER ALARM INTERFACE RELAY BOARD 1 AS400 RELAY BOARD 2 NOT INSTALLED CONTACT BOARD NEXT CANCEL SAVE 8 EXIT If there is no board the NOT INSTALLED message is displayed 3 Pressing NEXT will bring up the second page Figure 74 Customer alarm interface screen page 2 CUSTOMER ALARM INTERFACE REMOTE LED BOARD 1 REMOTE LED BOARD 2 REMOTE LED BOARD 3 PREV CANCEL SAVE 8 EXIT To access the Programmable Relay Board 1 highlight RELAY BOARD 1 from the first page of the CUSTOMER ALARM INTERFACE screen and press SELECT to bring up the following screen Figure 75 Programmable output relay board 1 AS400 assignment PROGRAMMABLE OUTPUT RELAY BOARD 1 RELAY ASSIGNMENTS PROGRAMMABLE RELAY 1 BATTERY DISCHARGING PROGRAMMABLE RELAY 2 LOW BATTERY WARNING PROGRAMMABLE RELAY 3 LOAD ON UPS LOAD ON BYPASS CANCEL SAVE amp EXIT The AS400 pre assigned relays are
68. ch is not available Therefore manually initiated transfer between the bypass line and the UPS is not permitted Emergency or overload transfer to bypass may still be available provided the Static Switch Unable alarm is not indicating Time to Overload Transfer During an overload condition the time remaining before transfer in seconds is displayed at the bottom of the load block 3 5 Communication Interfaces The Npower UPS can be configured with various communication ports to assist the Operator in moni toring the UPS system 88 Operation 3 5 1 3 5 2 RS 232 Port Local Reporting Terminal The Npower transmits UPS system status and history information to a remote terminal through an RS 232 Port in ASCII Format This feature is called the Service Terminal The service terminal inter face is intended to be accessed via PC terminal emulation software like Procomm Plus Microsoft Win dows Terminal or Hyperterminal or directly through a standard ASCII terminal A summary of Npower service terminal commands is provided in Table 8 below Two types of com mands are identified operational OPS and diagnostic DIAG Operational commands deal prima rily with machine operations metering alarm events and transient analysis This information is also available through the front panel Operator interface Diagnostic commands are intended to allow manipulation of the internal machine operating parameters Access to these co
69. ction that allows them to be latching or non latching If the alarm is latched then the programmable relay will also latch until the alarm is reset To begin programming the User Defined Relays highlight the relay to be programmed and press the SELECT button This action will bring up the List of Alarms Faults screen Figure 80 Initially the box beneath the relay will be empty To attach an alarm to each relay follow the steps under Navigating Protocol on page 56 A CAUTION Navigating through screens with additional navigational selections at the bottom of the display screen is slightly different from navigation involving only the navigation buttons below the display screen Specific instruction is given below Figure 80 List of alarm faults screen ALARM FAULT NAME PROG RELAY 1 BATT FUSE FAIL BATT LOW XFER RATTEFRY FUSF FAIL DC OV TRANSIENT INP PHASE ROT ERROR RECT FUSE FAIL RECT DRIVE 1 FAIL UP DOWN ADD REMOVE CLEAR EXIT The alarm at the top of the screen will be flashing NOTE If the Npower has Open Comms Discrete Inputs Input Contact Isolators Section 7 of the Options Manual these will show up on the alarm list and can be selected to connect to a programmable output relay 55 Operation 3 3 6 Navigating Protocol For the screen above and others like it the normal screen navigation rules are changed It is impor tant to differentiate between the selections at t
70. displaying these alarms The System has been notified from the OC Input Contact Input Contact DI option that a customer alarm has been 2 2 A ES RS NO NES activated The system will substitute user defined text when displaying these alarms The System has been notified from the OC Input Contact Input Contact Alarm YES YES NO YES DI option that a customer alarm has been 3 3 activated The system will substitute user defined text when displaying these alarms 87 Operation Table 7 Alarms functions and corrective actions continued Actual Alarm fault Name Displayed Description Fault On Front of Alarm Or Latch Dial Freeze Event Log Panel Fault Alarm Mask Mask Mask Mask Meaning and Corrective Action s The System has been notified from the OC Input Contact Input Contact DI option that a customer alarm has been 4 4 Alarmi YES YES NO ES activated The system will substitute user defined text when displaying these alarms The System has been notified from the OC Input Contact Input Contact DI option that a customer alarm has been 5 5 Aami YES I YES N9 YES activated The system will substitute user defined text when displaying these alarms The System has been notified from the OC Input Contact Input Contact DI option that a customer alarm has been 6 6 Alarmi YES YES NO YES activated The system will substitute use
71. e Action s On units equipped with an input filter Control Logic has determined that one or more of the filter fuses is open The logic will open the Input filter contactor The UPS will continue to run without input filtering Contact Liebert Global Service to check and repair the input filter On Battery On Battery Alarm NO NO NO YES Reports an On Battery state as long as the battery CB is closed Input Undervoltage alarm exists and the status bit ON UPS is set Battery Overcharge Battery Overchg Fault YES YES NO YES Battery charge current is 50 above the Battery Charge Current Limit for longer than 5 seconds The load will be transferred to Bypass If Bypass is not available the UPS will attempt to run from the battery If both battery and bypass are not available a full system shutdown will be initiated This fault will inhibit start up Contact Liebert Global Services immediately Byp Freq Error Bypass Frequency Error Fault NO NO NO YES The bypass frequency is outside the 5 of the system rating If the load is on bypass the static switch will be shut down and power will be lost to the load If the load is on UPS transfer to bypass will be inhibited until this fault clears or is corrected This fault will inhibit startup f fault persists check the bypass source for the cause of the frequency irregularity Contact Liebert Global services if you have
72. e to the primary CONFIGURATION Screen It will look like the figure below Figure 6 Configuration screen CONFIGURATION SYSTEM RATINGS SYSTEM SETTINGS USER SETTINGS FACTORY SETTINGS ALARM MASK CUSTOMER ALARM INTERFACE 2 Highlight USER SETTINGS using arrow keys and press SELECT 3 The USER SETTINGS screen will come up 4 Bracket NEXT using arrow keys and press SELECT five times This will take you to the sixth page of the USER SETTINGS screen Figure 7 User settings screen page 6 USER SETTINGS AUTO RESTART SETTING SYSTEM ACTIVE FILTER ENABLE ENABLED TEMPERATURE BATT CB TRIP NO CHANGE PASSWORD INTERRUPTED TRANSFER ENABLE DISABLE PREV CANCEL SAVE amp EXIT Highlight CHANGE PASSWORD This action will bring up the PASSWORD screen You must know the current password in order to change it Next you will be prompted to enter a new 4 digit pass word The new password may contain letters from A through Z and or digits from 1 through 9 5 You now have 5 minutes to examine and configure password protected screens 6 After five minutes you must re enter the password in order to unlock further password protected screens NOTE The TIME and DATE of all password changes are logged in the event log 18 Operation 3 3 Display Screens and Procedures The Operator Interface Display System of the Npower allows quick access to any screen the operator chooses The default screen is the Mimic Display Scree
73. ead the battery manufacturer s manual before working on or near the bat tery Under typical operation and with all UPS doors closed only normal safety precautions are necessary The area around the UPS system and battery should be kept free from puddles of water excess mois ture or debris Special safety precautions are required for procedures involving handling installation and mainte nance of the UPS system or the battery Observe precautions in the separate Installation Manual before handling or installing the UPS system Observe precautions in 4 0 Maintenance of this manual before and during performance of all maintenance on the UPS or battery This equipment contains several circuits that are energized with high voltage This is particularly true for oscilloscopes Always check with an AC and DC voltmeter to ensure safety before making con tact or using tools Even when the power is turned Off dangerously high potentials may exist at the capacitor banks Observe all battery precautions when near the battery for any reason Introduction 1 3 1 3 1 1 3 2 1 3 3 ONLY qualified service personnel should perform maintenance on the UPS system When performing maintenance with any part of the equipment under power service personnel and test equipment should be standing on rubber mats The service personnel should wear insulating shoes for isolation from direct contact with the floor earth ground Unless all power is re
74. ed at one second intervals The Input Status screen displays the following real time data Input AC Volts AB BC CA Input Current A B C Input Frequency Inlet Air Temperature Outlet Air Temperature Heat Sink Temperature 100 and 130 kVA will display 3 temperatures 1 for each heatsink 2 DC BUS BATTERY By highlighting and selecting BATTERY from the Mimic Display Screen the following screen comes up displaying DC bus voltage and the charge or discharge current This screen also shows BATTERY TEMPERATURE Press SELECT to return to the Mimic Display Screen Figure 16 DC bus battery status DC BUS BATTERY STATUS NUMBER OF BATT ONLINE DC BUS VOLT 540 BATT VOLT 412 BATT CURR 4 1 CHG BATT TEMP 25 C LAST BATTERY TEST 07 07 02 24 Operation The DC BUS BATTERY status screen displays the following real time data DC Bus Volts Battery Volts Battery Current Chg disch Battery Temperature This reading is the temperature of the ambient air in the battery cabinet e Battery Time Remaining 3 BYPASS INPUT Selecting BYPASS from the Monitor Mimic Display displays the following screen showing bypass input voltage and the bypass input frequency Press SELECT to return to the Monitor Mimic Display Figure 17 Bypass input status BYPASS INPUT STATUS A B C FREQ 59 9 HZ V L L 213 213 214 PHASE DIFF 0 The Bypass Input Block displays the following real time data Bypass AC Volts
75. ed limits of 80 to 115 Battery Charge must be greater than 90 The test is interlocked to Batt Ov Temp Warning alarm When this alarm is present battery test won t start DC volts must be greater than the DC Bus Float Voltage of 540 VDC A load must be greater than 15 of rated kVA The On Generator status must be False Input frequency must be within limits Auto and Manual tests are interlocked only one can be active at a time The recommended default time settings based on the battery size are shown in the table below Table 5 Default time settings Battery Type Test Duration 15 Minute 1Minute 30 Minute 2 Minutes 45 Minute 3 Minutes 60 Minute 4 Minutes 75 Minute 5 Minutes 90 Minute 6 Minutes The factory default setting is 60 seconds and can be set between 30 to 900 seconds The test starts by commanding the rectifier control circuit to lower the Rectifier output voltage The rectifier stays on but is phased back This means the Rectifier is still available to support the load if the battery fails A battery test will be aborted if any of the following become true The battery Over Temperature Warning becomes active Battery CB Input or Output contactors open Any phase of the Bypass or Input volts exceeds the limit of 80 and 115 If the battery voltage falls too quickly during the test Figure 85 Automatic test screen AUTO TEST AUTO TEST DISABLE BAT
76. ee nent ene 88 Table 9 Battery voltage record ssf cone soca bstae hb a atid as kee a ee oe 97 Table 10 Circuit breakers with compression lugs for power wiring 0 0 00 eee eee 97 Table 11 Terminal block with compression lugs for control Wiring oooooooooo o ooo 97 Table 12 Recommended test equipment and tools 0 0 een nas 98 IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important instructions that should be followed during maintenance of your Npower UPS and batteries WARNING Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to personnel Refer to separate installation manual for equipment handling information and installation procedures Follow all battery safety precautions in 4 0 Maintenance when installing charging or servicing batteries In addition to the hazard of electric shock gas produced by batteries can be explosive and sulfuric acid can cause severe burns In case of fire involving electrical equipment use only carbon dioxide fire extinguishers or others approved for use in electrical fire fighting Extreme caution is required when performing maintenance Be constantly aware that the UPS contains high DC as well as AC voltages With input power off and the battery disconnected high voltage at filter capacitors and power circuits should be discharged within 30 seconds However if a power circuit failure
77. ent within the UPS system The table below shows the default values of masks for each alarm fault the meaning of the Alarm and possible corrective actions The following information applies to the table 1 Latch Masks Dial Masks and unshaded Event log masks may be changed by the user The user may not change any Freeze Masks 2 The default alarm names for Input Contact 1 through Input Contact 8 can be modified by the user Table 7 Alarms functions and corrective actions Actual Alarm fault Name Displayed Description Fault On Front of Alarm Or Latch Dial Freeze Event Log Panel Fault Alarm Mask Mask Mask Mask Meaning and Corrective Action s Control Logic has determined that the battery breaker s is closed and the battery Battery Fuse Battery Fuse Fault YES YES NO YES fuse has been open for 10 seconds or Fail Fail longer Battery back up is no longer available Liebert Global Services should be called immediately Control Logic has determined that the battery breaker s is closed and the battery voltage has dropped below the End of Discharge limit The UPS will transfer to bypass If the transfer is successful the UPS will be shut down If the transfer was Fault YES YES YES YES unsuccessful logic will attempt to complete a System Shutdown before control power is lost Verify that input power is now available and restart the UPS following the instructions in this manual If the system fails to restart pr
78. er the numbers are pre programmed into the system However if the numbers need to be changed follow these steps 1 From the System Configuration screen press the Up or Down button to move the highlighted cursor to Auto Dial and press SELECT 2 The Auto Dial screen will appear Highlight and select the first Auto Dial Number 3 Press SELECT to move the arrow to the right 4 To change a digit press Up to increase the number or press the Down button to decrease it Press Select to set the value and move to the next digit 5 After changes have been made press SELECT again to return to the System Configuration screen 6 Ifrequired go to the Second Number screen and enter the correct number 7 Ifrequired go to the Modem Baud Rate screen and choose from the available baud rates Customer Alarm Interface The Npower UPS offers a Programmable Relay Board option allowing the Operator to program cer tain alarms or events to activate single or multiple output relays See Section 6 in the Options man ual In addition to the user defined programming capability of the system the Npower offers two pre defined relay assignments AS400 where only the first 3 relay assignments are pre configured with the other 5 assignments available for user definition and Standard Set where the first 7 relays are assigned with the remaining one left unprogrammed The 8th assignment is not available for user definition This means that the Operator
79. es Of Operation Refer to 2 0 Theory of Operation and 3 0 Operation for more details Normal Load On UPS The utility AC source provides power to the rectifier charger in the UPS module The rectifier charger converts the utility AC power to DC and supplies DC power to the UPS module inverter while simul taneously float charging the battery plant The UPS inverter converts DC to AC and furnishes AC power to the critical bus Input Power Failure If the utility source power fails or is outside the acceptable range the battery plant becomes the pri mary supplier of DC power to the inverter Recharge After the utility source power is restored or an alternate power source becomes available the recti fier charger slowly walks in to once again power the inverters and recharge the battery plant Introduction 1 3 4 1 3 5 1 3 6 1 3 7 Overload Overloads in critical systems may be caused by inrush currents during connected equipment startup or by faults in the critical load or distribution network The Liebert Npower UPS system can maintain full output voltage regulation while sustaining the following overloads Up to 125 for 10 minutes Up to 150 for 1 minute Up to 200 for 10 cycles For momentary faults above 200 of rated current the static switch turns on for 10 cycles to supply power from the bypass source Up to 6 000 amps of current can be supplied for the first half cycle The critical load remains
80. ese fea tures allowing the operator to determine their status Latching This option latches the alarm when it occurs Latching alarms will not automatically clear from the screen when the alarm condition ends and must be cleared from the screen by the operator Dial When an alarm condition occurs and the system has an Auto Dial option the system will dial out to a designated number in accordance with the Dial Out Auto Dial instructions set in the UPS See AUTO DIAL on page 52 for more information on this feature Freeze This feature will freeze the History Log Buffer s if an alarm is detected This feature is used mainly for diagnostic purpose by Liebert Global Services and Engineering Event Logging The list of alarms that can be masked are shown in Table 7 Most Events are automatically logged into the Event History Buffer Events that can be selected or deselected by the user are Input Line Fail Input Under Voltage Input Over Voltage Bypass Sync Error Bypass Voltage Out of Tolerance Bypass Line Fail Input Contact Alarms if this option is installed 50 Operation Delay This refers to the time in seconds that must occur before the UPS recognizes an alarm function The delay can be anywhere from 0 to 99 9 seconds in 0 1 second intervals If an alarm is set to Latch it will only recognize the alarm and latch after the delay period Figure 71 Alarm fault name screen ALARM FAULT NAME ALARM FAULT
81. formation can also be automatically sent by telephone modem Call 1 800 Liebert to report a problem or to request assistance Corrective Actions For each alarm message on the Operator Control Panel and the Remote Alarm Status Panel you can find the recommended corrective action in 3 4 2 Alarms Recommended Test Equipment A list of recommended test equipment and tools required to maintain troubleshoot and repair the UPS module is given in Table 4 2 You may substitute instruments of equivalent range and accuracy All instruments should be calibrated and be within the current calibration cycle Calibration data for the instruments should be maintained in equipment history files and the instruments labeled for audit and verification Table 12 Recommended test equipment and tools Qty Test Equipment Manufacturer Model or Type 1 Oscilloscope Tektronix H P or Fluke DC to 50 MHz 2 Voltage Probes Tektronix H P or Fluke 10X with 10 ft Cable 2 Voltage Probes Tektronix H P or Fluke 100X with 10 ft Cable 1 Digital Multi meter Fluke 8060 with Test Leads 1 Tool Kit N A Standard electrical contractor tools 100 Maintenance NOTES 101 Maintenance 102 Ensuring The High Availability Of Mission Critical Data And Applications Emerson Network Power the global leader in enabling business critical Technical Support Service continuity ensures network resiliency and adaptability throug
82. function and should be investigated Items to check on the various UPS display screens include 1 Output voltage of all phases should be within 2 of normal voltage Output currents on each phase should not normally differ by more than 20 If a greater difference is noted the load is unbalanced and corrective action should be taken to redistribute the load if possible 2 Ifthe UPS has not operated on battery power during the last 10 hours the batteries should require little charging current Battery mimic should indicate normal DC voltage with relatively little battery charge current 3 Input current on each phase should be within 10 of the average input current Alarm messages indicate malfunction or impending malfunction A daily check of the Operator Control Panel will help to provide an early detection of problems Refer to Table 7 to interpret alarm messages 4 Tracing a problem to a particular section is facilitated by alarm messages and the metered parameter indications These are stored in the Status Reports and can be displayed at the Operator Control Panel or at an optional terminal NOTE If the UPS system has a blown fuse the cause should be determined before you replace the fuse Contact Liebert Global Services Reporting a Problem If a problem occurs within the UPS review all alarm messages along with other pertinent data This information should be given via telephone to the Liebert Global Service dispatcher This in
83. g on status of the critical load The Operator can proceed with the transfer retransfer by highlighting OK and pressing SELECT or EXIT If a transfer or retransfer is not allowed the FLASHING message Transfer Not Allowed is displayed and the only option is to Exit If the Operator chooses to Exit the screen returns to the Main Menu Figure 81 Manual transfer retransfer screen when transfer is allowed MANUAL TRANSFER RETRANSFER BYPASS OK INVERTER OK INT BYP SWITCH NORMAL EXT MAINT SWITCH ON LINE INVERTER LAG 1 DEGREE TRANSFER TO BYPASS a EXIT 56 Operation Figure 82 Manual transfer retransfer screen when transfer is not allowed MANUAL TRANSFER RETRANSFER BYPASS INVERTER INTERNAL BYPASS SWITCH NORMAL EXT MAINT SWITCH ON LINE INVERTER IN SYNC TRANSFER NOT ALLOWED OK EXIT In the figure above the message TRANSFER NOT ALLOWED will be flashing 3 3 7 Battery Management The Battery Management screens display information on battery self tests battery equalization bat tery temperature and battery cycle monitoring This information enables the operator to immediately see the effects of load shedding on time remaining and to accurately assess remaining power resources The Battery Management screen is accessed from the Main Menu Figure 83 Battery management screen BATTERY MANAGEMENT BATTERY TEST BATTERY EQUALIZER BATTERY TEMP COMPENSATION CHARGE BATTERY CYCLE MONITOR BATTERY
84. g screen will come up Figure 96 Battery temp compensation edit screen 15 C lt TEMPERATURE MIN 500 0850 c A Battery Cycle Monitor The Battery Cycle Monitor feature provides detailed data each time the batteries experience a dis charge event By keeping track of cycles imposed on the battery the Operator has an indication of consumption amount of useful life left on the batteries and an early warning to service and or replace the batteries The data can be retrieved from the front panel LCD remote terminal interface or a modem connection The Battery Cycle Monitor screen can be selected from the Battery Management screen See Figure 83 The default setting is set to ENABLE 62 Operation Figure 97 Battery cycle monitor screen BATTERY CYCLE MONITOR BCM DISABLE 0 30 SECONDS DISCHARGE CYCLES 31 90 SECONDS DISCHARGE CYCLES 91 240 SECONDS DISCHARGE CYCLES OVER 240 SECONDS DISCHARGE CYCLES NEXT The second page accessed by selecting NEXT See Figure 98 allows the Operator to view the Sum mary Page and to erase the BCM time bucket data permanently from the non volatile storage This action requires the system password The Operator can also erase the summary information as well providing he inputs the proper password However this is not recommended for anyone except factory technicians or Liebert Service Engineers Figure 98 Battery cycle monitor screen page 2 BATTERY CYCL
85. gone into the sharing of one modem For example incoming connections take precedence over dial out alarms or pager alarms When a dial out alarm is articulated each number is tried at least 3 times before giving up After giving up the pager module gains access to the modem and will begin trying to send the alarm to a pager If modem dial out is disabled but pager dial out is enabled the pager alarm will skip the modem dial out module and proceed immediately to the pager module dial out When an alarm message is sent to the pager it includes a system header and a data portion that looks like the following System ID 00000000 System Tag 00000000 1 BATTERY FUSE FAIL 5 11 01 3 22 PM A list of alarms masks and corrective action is shown in Table 7 Remote Alarm Status Panel The NPower UPS may be ordered with an Optional Remote Alarm Status Panel This remotely mounted panel within 500 feet provides an LED indication of the following Alarm conditions Load On UPS Load On Bypass Battery Discharge Low Battery Warning Overload Ambient Overtemp System Summary Alarm New Alarm The Remote Alarm Status Panel housing is a NEMA Type I enclosure available for remote mounting on walls or columns The Remote Alarm Status Panel displays the 8 alarms specified above Signals for the alarms are carried over a 4 wire connection customer supplied which connects the Npower CANBUS data link and Optional Power Supply to the Remote Al
86. h _ Web Site a family of technologies including Liebert power and cooling www liebert com Monitoring technologies that protect and support business critical systems Liebert solutions employ an adaptive architecture that responds oe monitoring emersonnetworkpower com to changes in criticality density and capacity Enterprises benefit Outside the US 614 841 6755 from greater IT system availability operational flexibility and Single Phase UPS reduced capital equipment and operating costs 800 222 5877 upstech emersonnetworkpower com Outside the US 614 841 6755 Three Phase UPS 800 543 2378 powertech emersonnetworkpower com Environmental Systems 800 543 2778 Outside the United States 614 888 0246 Locations United States 1050 Dearborn Drive P O Box 29186 Columbus OH 43229 Europe Via Leonardo Da Vinci 8 Zona Industriale Tognana 35028 Piove Di Sacco PD Italy 39 049 9719111 While every precaution has been taken to ensure the accuracy e and completeness of this literature Liebert Corporation assumes no Fax 39 049 5841 251 responsibility and disclaims all liability for damages resulting from use of Asia this information or for any errors or omissions 7 F Dah Sing Financial Centre 2006 Liebert Corporation 108 Gloucester Road Wanchai All rights reserved throughout the world Specifications subject to change without notice Hong Kong Liebert and the Liebert logo are registered trademarks of Liebert 8
87. has occurred you should assume that high voltage may still exist after shutdown Check with a voltmeter before making contact AC voltage will remain on the system bypass the UPS output terminals and the static bypass switch unless associated external circuit breakers are opened Check for voltage with both AC and DC voltmeters prior to making contact When the UPS system is under power both the operator and any test equipment must be isolated from direct contact with earth ground and the UPS chassis frame by using rubber mats Some components within the cabinets are not connected to chassis ground Any contact between floating circuits and the chassis is a lethal shock hazard Exercise caution that the test instrument exterior does not make contact either physically or electrically with earth ground OVERVIEW OF MANUAL The Npower manual is organized so that information can be found quickly Each major topic is sepa rated by sections and there is a Table of Contents for each section The names of the sections and their contents are described below Section 1 INTRODUCTION is a summary of the Npower Uninterruptible Power System UPS It describes some of the unique features and benefits of the Npower UPS as well as the design princi ples and standards that Liebert follows in the manufacture of each system A description of the Npower system and an overview of its functions are also included Section 2 THEORY OF OPERATIO
88. he bottom of the display screen UP DOWN ADD REMOVE CLEAR EXIT and the navigation buttons or arrow keys below the display screen To scroll up the Alarm Fault list use the arrow keys to highlight the UP selection at the bottom of the display screen Next press the SELECT navigation button Continue this sequence until you have positioned the proper Alarm Fault in the active position at the top of the list To scroll down the list use the arrow key to highlight the DOWN selection at the bottom of the display screen Next press the SELECT navigation Continue until the proper alarm is positioned at the top of the list When the selected Alarm Fault is in the active position at the top of the list it will be flashing To attach this alarm to a Programmable Relay use the arrow keys to highlight ADD at the bottom of the display screen Press SELECT and your selection will now appear in the right hand box You may attach up to four alarms to each relay by following this procedure Since there are almost 200 alarms it is advised that you review the entire list and note which alarms you want connected to each relay before beginning your selections Keep in mind that if you attach more than 1 alarm to the relay and the relay is triggered you will not be advised which of the alarms is activated You may be able to determine this through other diagnostic features of the Npower but it will not be evident from this feature If you decide to remove an alar
89. heck all air inlets and exhausts for blockage and check the air filter Check the actual load against the UPS rating Remove any excess load Contact Liebert Global Services if the alarm persists Pwr Supply F1 Fail Power Supply F1 Fail Fault NO YES NO YES Failure of this fuse will remove control power The UPS will attempt to transfer to Static Bypass if available Locate the cause of any failure before replacing a fuse or Contact Liebert Global Services Immediately SWGR Power Fail SWGR Power Fail Fault NO YES NO YES UPS will transfer to Static Bypass if available and shut down the UPS Start up will be inhibited Contact Liebert Global Services 78 Operation Table 7 Alarms functions and corrective actions continued Actual Alarm fault Name Displayed On Front Panel Rectifier Fail Description of Alarm Fault Rectifier Fail Fault Or Alarm Fault Latch Mask YES Dial Mask YES Freeze Mask YES Event Log Mask YES Meaning and Corrective Action s This is a summary event based on the detection of at least one of these faults being active Battery Overcharge DC Overvoltage Steady State DC Overvoltage Transient DC Undervoltage Steady State Delta Wye Current Imbalance Rectifier Fuse Fail Rectifier Drive 1 Fail Rectifier Drive 2 Fail All actions are controlled by the causal fault I
90. iates an automatic load transfer to the bypass line Automatic Transfers to Bypass The UPS system will initiate an automatic load transfer to the bypass line if an overload condition exceeds the current versus time curve of overload capacity or if specified UPS system faults occur The Overload Transfer and Output Under Voltage alarm conditions will initiate an automatic trans fer to bypass and the Load On Bypass message will be displayed The Status Report screens will include the Automatic Transfer to Bypass message Other UPS system faults will initiate an auto matic transfer to bypass followed immediately by the shutdown and isolation of the UPS system The static bypass switch is closed and the contactor is closed Bypass power is supplied to the critical load through the static bypass switch Automatic Re transfers to UPS Automatic Retransfer to UPS is an option that you can select from the System Configuration screen If you do not want the UPS system to initiate any automatic re transfers set Max Auto Rexfer Attempts to zero 0 In an automatic retransfer the output contactor closes and the static bypass switch opens The following conditions must be present to initiate an automatic retransfer of the critical load from the bypass source to the UPS inverter The number of Auto Rexfer Attempts selected must be greater than zero 0 Critical load was initially transferred to the bypass source due to a system overload only A
91. il the battery plant is reconnected Figure 1 UPS controls and display screen with example of the monitor mimic screen MIMIC DISPLAY E ra ME SYS STATUS 0 Liebert MAIN MENU Introduction 1 4 1 5 Operator Controls Liebert Npower UPS modules are equipped with a microprocessor based Operator Display Screen and Control Panel designed for convenient and reliable operation The front panel location of the monitor ing and control system enables the Operator to quickly identify the current status of the UPS and to perform most of the manual operations The operator display screen is driven by an easy to follow menu prompted software program that con trols and monitors the UPS system Detailed instructions on how to interpret the displays and use the controls are in 3 0 Operation Options A number of standard pre designed options are available from Liebert for your UPS system Described below are the most frequently provided options Note that the battery items 1 and 2 are required to complete the UPS system The remaining options provide improved system performance or convenience 1 Battery and Racks The batteries provide power in the event of a power outage The Liebert UPS can use a variety of battery types provided the battery plant is designed for the UPS DC voltage range and the load requirements of your application 2 Module Battery Disconnect The UPS system uti
92. ines in the diagrams indicate power flow and power availability Load on Bypass Load on bypass with the UPS not available is shown in the figure below The UPS system could be in this mode of operation during either initial startup or UPS system shutdown and isolation for maintenance Figure 112Load on bypass UPS not available 3 6 2 MIMIC DISPLAY SERV BYPASS SS RECT BATTERY E SYS STATUS Liebert HMBINIMEN OK to Transfer The OK to Transfer status message will be displayed when the bypass line and UPS system output power are both available their voltage frequency and phase synchronization are matched within specifications and the Static Switch Disconnects are closed ON An alarm message may be dis played to indicate Load on Bypass If no alarm is displayed the operating status is Load On UPS When the OK to Transfer message is displayed you can perform a manual transfer of the load from the UPS system to bypass or a manual retransfer of the load from bypass to the UPS system See 3 3 6 Manual Transfer for more information 92 Operation Figure 113Load on bypass UPS available and battery charging MIMIC DISPLAY 3 6 3 3 6 4 BYPASS FAULTS ALARMS Momentary Overloads An overload in the critical load will continue to be supplied by the UPS system if the overload condi tio
93. ing equip ment downtime as a result of utility source power problems Introduction 1 2 Reliability Reliability is the most important design goal for Uninterruptible Power Systems All Liebert 3 Phase UPS systems have demonstrated reliability by achieving a field proven critical bus MTBF in excess of one million hours In addition our Quality Assurance program is certified to the requirements of ISO 9001 standards Liebert UPS systems are ETL listed to the requirements of UL 1778 CSA Certified and when appli cable CE marked All equipment and components are manufactured to applicable UL NEC IEC EN NEMA ANSL IEEE EN50091 1 EN50091 2 and CSA standards and guidelines Designed For Success The keys to reliability in the design of the UPS system are using conservatively rated components minimizing transfers to bypass making operator controls understandable and providing easy access for maintenance and repair Liebert UPS systems lead the industry in all these areas For example the Npower can clear substantial overloads through the solid state static bypass switch without transferring to the bypass source By minimizing transfers to bypass the Npower mini mizes operation of electrical components and enhances system reliability As mentioned above the system control logic has been packaged into Digital Signal Processors DSPs to optimize system performance and eliminate the failure prone discrete logic boards used in o
94. ing the first alarm select the next alarm to be viewed and proceed as in the steps above Figure 72 Alarm edit screen ALARM FAULT NAME BATTERY FUSE FAIL LATCHING YES DIAL FREEZE EVENT LOG SAVE amp EXIT CANCEL 51 Operation To change the programmable attributes highlight the attribute to be edited and press the SELECT button This action brings up a screen allowing the Operator to toggle between YES and NO NOTE Some attributes cannot be edited AUTO DIAL The Npower UPS can automatically dial through the optional modem each of two pre programmed telephone numbers up to 12 digits when specified alarm conditions occur within the UPS system The Npower attempts to dial the first number three times at 45 second intervals If there is no answer the system rolls over to the second number and repeats the process If there is no answer on the second number the system goes back to the first number repeating the process The system con tinues this sequence until connected or disabled Upon connection the system transmits data in ASCII format that includes the system identification code the present alarm message s and the time that the alarm s occurred Refer to 3 5 Communi cation Interfaces Refer to the Special Functions column in Table 7 Alarms functions and corrective actions to see which alarm messages will initiate an auto dial call If the auto dial numbers were specified at time of ord
95. is manual while performing maintenance or correcting a malfunc tion If you have any doubt as to what must be done call Liebert Global Services at 1 800 LIEBERT for further instructions The UPS is designed for unattended operation but does require some com mon sense maintenance Keep good records Troubleshooting is easier if you maintain historical service records Keep it clean Maintain the UPS free of dust and any moisture Keep it cool Battery systems must be kept in the range of 72 77 F 22 25 C in order to meet design spec ifications for capacity and longevity The UPS will reliably meet all performance specifications at temperatures up to 104 F 40 C and can be slightly derated for operation at even higher temperatures However per formance and longevity will be optimized when the UPS is operated at the same temperature as the batteries Keep connections tight Tighten all connections at installation and at least annually thereafter See 4 2 5 Torque Requirements Record Log Set up a maintenance log to record scheduled checks and any abnormal conditions The log should have space for all metered data including phase readings alarm messages UPS mode of operation air filter replacement date and observation notes A second log should be maintained for the battery module as directed by the battery manufacturer A periodic walk through inspection of the UPS and battery rooms is advised to check
96. is supplying power to an Auxiliary device this alarm indicates that the system has detected a failure in the Aux Power circuit EPO Power Fail EPO Power Fail Alarm NO YES NO YES If the unit is supplying power to an Auxiliary device this alarm indicates that the system has detected a failure in the Aux Power circuit LBS Power Fail LBS Power Fail Alarm NO YES NO YES Power to the Load Bus Sync circuit has been lost Check external wiring Contact Liebert Global Services 83 Operation Table 7 Alarms functions and corrective actions continued Actual Alarm fault Name Displayed Description Fault On Front of Alarm Or Latch Dial Freeze Event Log Panel Fault Alarm Mask Mask Mask Mask Meaning and Corrective Action s With the Batt Gnd Fault option installed and Batt Gnd Battery ground the batt breaker closed the DSP sees its Fault fault alarm Alarm NO YES NO YES BGF input asserted by the SWGR No action required With the Auxiliary temp sensor installed it oe Ovtemp Aux Overtemp Alam YES YES NO YES lis reading 85 or more of the specified arning Warning j Maximum Aux temperature set point value Batt Ovtem Battery With the battery breaker closed the battery Warni P Overtemp Alarm NO YES NO YES has exceeded the Battery Temperature arning Warning Alarm Threshold set point value Sensors on
97. l a shutdown will occur per the Overload vs time curve The alarm will clear when the overload falls to below 110 of the rating SBS Ovid Phase C SBS Overload Phase C Alarm NO NO NO YES With the load on Static Bypass the phase C output kVA or kW or RMS current has exceeded 115 of the nominal per phase kVA or kW or RMS current rating The UPS will show time remaining until a shutdown will occur per the Overload vs time curve The alarm will clear when the overload falls to below 110 of the rating Inverter Limit Inverter Current Limit Alarm NO NO NO YES The instantaneous inverter current of any one phase has exceeded its pulse by pulse current limit value The UPS will shutdown when the Current Overload vs time curve is exceeded Output OF UF Output OF UF Alarm NO YES NO YES Output frequency differs from the nominal 60Hz by more than 0 5Hz No transfer or shutdown occurs Contact Liebert Global Services at once Inv Ovld Phase A Inverter Overload Phase A Alarm NO YES NO YES With the load on UPS Phase x output KVA or KW or RMS current has exceeded 105 of the nominal per phase rating The UPS will begin sending the time remaining until a transfer or shutdown will occur per the Overload vs Time Curve The alarm condition will clear when the overload returns to below the nominal rating Inv Ovld Phase B Inverter Overload
98. l come up 46 Operation Figure 60 Communications options screen page 2 COMMUNICATION OPTIONS REMOTE ALARM 2 NO REMOTE ALARM 3 NO SITESCAN NO NIC NO AS 400 NO NEXT PREV EXIT Select NEXT to go to the Communication Options screen third page User Settings The User Settings are accessed from the Configuration Screen Figure 40 Figure 61 User settings screen page 1 USER SETTINGS OUTPUT PLL PHASE ADJUST 0 0 OUTPUT PLL SLEW RATE 0 5 OUTPUT PLL SYNC RANGE 1 0 DC BUS FLOAT VOLT 540 BATT CHARGE LIMIT 1 6 NEXT CANCEL SAVE amp EXIT Figure 62 User settings screen page 2 USER SETTINGS BATT TIME LOW WARNING 5 BATT TIME T 1 AT 100 15 BATT TIME T 2 AT 50 45 BATT EOD LOWER SET POINT 384 BATT EOD UPPER SET POINT 427 NEXT PREV CANCEL SAVE 8 EXIT 47 Operation Figure 63 User settings screen page 3 USER SETTINGS BATT EOD RAMP START 15 BATT EOD RAMP END 60 BATT TEMP ALARM LIMIT 40 BATT COMPARTMENT TEMP LIMIT 50 INPUT PLL PHASE ADJUST 0 0 NEXT PREV CANCEL SAVE 8 EXIT Figure 64 User settings screen Page 4 USER SETTINGS INPUT PLL SLEW RATE INPUT PLL SYNC RATE INPUT LIMIT WALK IN LCD CONTRAST LED BRIGHTNESS NEXT PREV CANCEL SAVE 8 EXIT Figure 65 User settings screen page 5 USER SETTINGS ALARM AUDIO LEVEL AUX TEMPERATURE LIMIT 40 AUTO REXFER COUNTER HR 5 BATT GND FAULT BREAKER TRIP YES 10 PASSIV
99. l modems allow you to configure the UPS to 1 Make outgoing calls to a computer in an attempt to notify of a pressing alarm condition 2 Accept incoming calls so a remote computer can connect to the UPS and serve as a monitoring station 3 Make outgoing calls to a pager Auto Dial The Npower will automatically dial a pre programmed customer selected phone number when spec ified alarm conditions occur The auto dial phone number an alternate number and the modem baud rate are programmed by using the System Configuration screen See Options Manual for program ming instructions The alarm messages that initiate an auto dial call are identified in Table 7 When the auto dial function is initiated automatic dial attempts three times to dial the first phone number at 45 second intervals If unanswered the system rolls over to the second number and repeats the sequence After three tries on each line the auto dial function is discontinued at which point the pager module See Dial Out Pager on page 90 gains access to the modem Once a connection is made the system transmits the information on the Present Status Report screen then hangs up The Present Status Report in ASCII Format includes the UPS system identifi cation number date time alarm messages and metered parameter indications 89 Operation Requesting Information If your Npower UPS is equipped with a modem and telephone line you can call the UPS and receive
100. lizes a separate Module Battery Disconnect for remotely located batteries A sensing circuit in the UPS module set at the battery low voltage limit trips the Module Battery Disconnect to safeguard the battery from excessive discharge The Module Battery Disconnect has an undervoltage release mechanism designed to ensure that during any shutdown or failure mode all battery potential is removed from the UPS system 3 Input Distortion Filter Trap This filter reduces input current reflected harmonic distortion to less than 10 THD at full load The filter is factory installed within the UPS This filter also improves the input power factor to better than 0 95 lagging 4 Load Bus Synchronization LBS The Load Bus Sync LBS option keeps two independent UPS modules and therefore their critical load buses in sync even when the modules are operating on batteries or asynchronous AC sources This means that critical loads connected to both load buses can switch seamlessly between the two 5 SiteScan Central Monitoring System Liebert manufactures a central monitoring system that automatically displays key UPS measurements and alarms as well as data from a variety of sensors This monitoring system signals alarms so corrective action can be taken Events and data can be printed in hard copy Data can be logged for analysis The SiteScan Interface port is standard for the Npower 6 Remote Alarm Status Panel The UPS system may also be provided with an
101. m from the selected alarm set scroll the list to put the alarm you want to remove in the top flashing position on the ALARM FAULT NAME list Use the arrow keys to move the cursor to REMOVE Press SELECT to remove the alarm from the right hand connected list If you wish to clear all the alarms and start over move the cursor to CLEAR and press SELECT After you have selected the alarms you want connected to PROG RELAY 1 use the arrow keys to move the cursor to EXIT press SELECT This will put you back to the PROGRAMMABLE OUTPUT RELAY BOARD 1 screen Follow the procedure above to program the next relay When all of the relays you wish to program have been completed highlight SAVE EXIT and press SELECT A CAUTION You must select save amp exit from the programmable output relay board screen or your selections will not be saved If you have a second relay board installed from the CUSTOMER ALARM INTERFACE screen repeat the same procedures for RELAY BOARD 2 Manual Transfer The Manual Transfer screen allows the Operator to transfer the critical load to and from bypass through the static bypass switch This screen can only be accessed when the rotary switch is on Nor mal position To access the screen start at the MAIN MENU Highlight MANUAL TRANSFER and press SELECT There are 3 status options for the Inverter In sync lag x degrees and lead x degrees The message Retransfer to UPS or Transfer to Bypass will appear dependin
102. man ual retransfer from bypass is required if the transfer to bypass was caused by any condition other than output overload The load has since dropped below 100 of the rated load Both the Input contactor and the Battery MBD remain closed since the overload transfer OK to Transfer signal received from the control logic for at least 10 seconds within 5 minutes of the system overload transfer A manual retransfer from bypass is required for overloads lasting 5 minutes or more Cyclic overloads which occur up to five select range is O to 5 times in 60 minutes are automati cally returned to the inverter for each event including the Nth overload A manually initiated retransfer from bypass is required for the N 1 overload 94 Operation Automatic Module Off Line For specified UPS system faults the control logic will initiate an automatic transfer to bypass fol lowed immediately by a shutdown and isolation of the UPS system All UPS contactors and the bat tery circuit breaker are opened The static bypass switch will close if the bypass line is available Note that the bypass line is usually not available during Low Battery Shutdown The following UPS system faults will initiate an automatic transfer to bypass DC Over Voltage Shutdown Hardware Shutdown Inverter Fault Low Battery Shutdown Output Over Voltage Overload Shutdown Over Temperature Time out Rectifier Fuse Blown Reverse Power Refer to 3 4 Fault
103. mmands is limited through password protection Table 8 Service terminal command summary Command Type Description OPS Reports a command listing same as HELP OR provides help with specific commands AA OPS Reports active alarms AF OPS Reports active faults DATE OPS Reports the current date EL OPS Reports entire event log most recent on top HELP OPS Reports a command listing same as OR provides help with specific commands HL OPS Reports the entire requested history log comma delimited if frozen from oldest frame to newest SPT OPS Reports setpoints for group number SR OPS Reports active status reports TIME OPS Reports the current time in military format UPMDR OPS Reports metering data using real values In addition to the local RS 232 Port Npower will interface with an External modem which uses the same ASCII command set Likewise the SiteScan port can support SiteScan communications What ever communication options are installed in the Npower UPS can all be used simultaneously Worldwide Reporting The Npower has a standard Interface Terminal Block to connect to an optional external modem An internal optional modem can also be installed although the external modem cannot be utilized if the system is configured with an internal modem The internal modem is compatible with standard ana log telephone lines and most standard telephone equipment The internal or externa
104. moved from the equipment one person should never work alone A second per son should be standing by to assist and summon help in case an accident should occur This is partic ularly true when work is performed on the battery Three types of messages are used throughout the manual to stress important text Carefully read the text below each Warning Caution and Note and use professional skills and prudent care when per forming the actions described by that text A Warning signals the presence of a possible serious life threatening condition For example A WARNING Lethal voltages may be present within this unit even when it is apparently not operating Observe all cautions and warnings in this manual Failure to do so could result in serious injury or death Do not work on or operate this equipment unless you are fully qualified to do so Never work alone A Caution indicates a condition that could seriously damage equipment and possibly injure personnel For example CAUTION Make sure you understand the proper sequence before operating any circuit breaker Operating a Maintenance Bypass circuit breaker out of sequence could cut off power to the critical load A Note emphasizes important text If the note is not followed equipment could be damaged or may not operate properly For example NOTE If the UPS system has a blown fuse the cause should be determined before you replace the fuse Contact Liebert Global Services Mod
105. n MENU TREE The figure below shows the primary screens that you can access through the Operator Interface Dis play System Figure 8 Menu tree Mimic Startup Status Display Shutdown Reports Manual Transf Battery Retransfer Mgmt Configuration Calibration Battery Event System Test Log Ratings Input Startup System Status Settings Manual Equilizer Output Startup User Load Settings Temp Status User on Battery Shut Settings Status Down Charge Battery Cycle Customer Alarm Interface Battery Time Remaining NOTE Any screens where changes in configuring settings or data can be made including all the Configuration screens are password protected 19 Operation Primary Screens The Main Menu has eight primary screens Please note that some screens have multiple pages because not all the information can fit on one page To access the next page highlight NEXT and press SELECT To access the previous page highlight PREV and press SELECT Mimic Display This graphic portrays the power flow through the UPS Switch indications system status and alarm messages are all displayed on this screen Detail screens can display input volt age and current readings battery status and load characteristics and alarm info Status Reports This display consists of three sub menu selections present status history log and event log These screens display data on the system s present and past pe
106. n With the battery breaker closed the battery Bait Test Battery Test Alarm YES YES NO YES lhas failed the self test Momentary display Failed Failed A F Sets flag in the event history log With the battery breaker closed the battery Batt Test Battery Test Alarm NO NO NO YES has passed the self test Momentary Passed Passed display Sets flag in the event history log The User has modified and saved one or Config Config more settings on the configuration screen Modified Modified Alarm NO NO NO YES Momentary display Sets flag in the event history log 85 Operation Table 7 Alarms functions and corrective actions continued Actual Alarm fault Name Displayed Description Fault On Front of Alarm Or Latch Dial Freeze Event Log Panel Fault Alarm Mask Mask Mask Mask Meaning and Corrective Action s The generator option is installed the system is on generator and the Delayed Delayed Batt Delayed ie Charge Battery Charge Alarm NO NO NO YES Battery Charge is suppressing battery charging to reduce the load on the generator Reduced I Reduced The UPS recognizes that the source is a ae Alarm NO NO NO YES generator and has reduced the current limit Limit Current Limit a setting to avoid generator overloading Per the user request all event logs have Event Log Event Log been cleared This will be the first alarm in Clea
107. n the user is unable to issue a retransfer command through the manual transfer retransfer screen If the option is installed and the auxiliary contact status is read as switch is in the Bypass or Mainte nance position the critical load shutdown message reads UPS off Multiple Battery Cabinets The Npower system offers an option allowing for the installation of more than two battery cabinets The option consists of a Multiple Battery Breaker MBB board that mounts on the control door and an Input Contact Isolator ICI board that mounts in the option area See the Multiple Battery Breaker Option in the options manual The ICI board allows the Npower system to sense multiple battery cabinets and the MBB board allows the UPS to support multiple battery cabinets by supplying power to the UVR coil of additional battery cabinets To access the screen for setting the number of battery cabinets in the system navigate from the MAIN MENU to CONFIGURATION to SYSTEM SETTINGS page 3 Select NUMBER OF BAT TERY CABINETS to bring up the following password protected screen Figure 29 Set number of battery cabinets screen NUMBER OF BATTERY CABINETS a A Set the number of battery cabinets by changing the number in the highlighted box Pressing SELECT will save this information and return Operator to the System Settings Screen 32 Operation 3 3 3 Shutdown To shut down the UPS navigate to the MAIN MENU and select ST
108. n does not exceed the current versus time curve of overload capacity for the UPS For momentary overloads exceeding 200 of rated system current the static switch turns on for 10 cycles This provides current from the bypass line in parallel with current from the UPS system out put By providing two power sources simultaneously high current can be supplied to the critical load with full output voltage regulation The critical load can be sustained through inrush currents and momentary faults If an overload situation exceeds 10 cycles the UPS module continues to supply power to the critical load if it remains within the current versus time curve of overload capacity If the system overload capacity is exceeded the UPS control logic initiates an automatic transfer to the bypass line by oper ating the static bypass switch and the contactors output and bypass Input Power Failure Load on Battery If the utility AC power source fails or is outside the acceptable range the battery plant becomes the power source for the UPS module inverter The UPS system continues to supply power to the critical load and also to the UPS controls You can use the Battery Time screen at the UPS modules to monitor the present battery voltage com pared to the shutdown value The length of time the battery can sustain the load depends on the size of the load and the size and condition of the battery plant The battery plant is typically large enough to supply a 1
109. nd to a separate terminal board for customer use e Reporting key systems information via SNMP interface to a network monitoring system NOTE All external communication devices are optional equipment Firmware The operator interface display system software enables the operator to monitor the UPS system sta tus to control the power flow through the UPS to monitor all of the meter readings to execute the start up shutdown and the load transfer procedures to access the event history files and to make adjustments to the programmable parameters The following is a list of the firmware features 1 The menu driven software prompts the operator for input 2 Step by step instructions assist the operator during the start up shutdown and the load transfer procedures This helps to eliminate operator errors 3 Graphics based mimic diagrams illustrate the position of internal switches and the power flow through the UPS system 4 The Present Status screen reports information about the system s present status The History Status screen chronicles the events leading up to and immediately after a fault The Event History screen lists all of the alarm messages that have been logged over a period of time Refer to 3 0 Operation for a description of the controls and indicators located on the Operator Con trol Panel Theory of Operation 2 2 2 2 2 3 Rectifier Charger The UPS module rectifier charger consists of input fuses A
110. nverter Fail Inverter Fail Fault YES YES YES YES This is a summary event based on the detection of at least one of the following IDC Peak IGBT Drive Fail Output Overvoltage Transfer Output Undervoltage Transfer Inverter DC Offset All actions are controlled by the causal faults Ovtemp time out Sd Overtemp Time out Shutdown Fault YES YES NO YES An Equipment Over temperature condition has persisted for more than 10 minutes The load is transferred to the bypass line and the UPS module is shut down Check the air intake air exhaust and filters before attempting to start up the UPS Transfer Failed Sd Transfer Failed Shutdown Fault YES YES YES YES A transfer to Static Bypass was unsuccessfully attempted and power to the load was lost Attempt to restart the system Contact Liebert Global Services Ctrl Fault SBS on Hardware Sd Controller fault SBS on Hardware Shutdown Fault Fault YES YES YES NO NO NO YES YES Indicates that the unit has transferred to SBS without the knowledge of the UPSC It occurs when the UPSC s Watchdog Fail line is automatically asserted during a UPSC reset This is a permanent latched condition which requires service Contact Liebert Global Services at once At least one of the following alarm conditions is present Inverter Fault Rectifier Fuse Blown Reverse Power Over load Shutdown logic
111. odule to your site requirements Some of the information displayed is factory set and should only be changed by LGS Parameters that can be adjusted by the Operator include date time auto dial number and modem baud rate The System Configuration screen is categorized as a Security Access screen This means that anyone may review the present parameters but only authorized Operators may make changes See 3 2 Security Access and Passwords for more information on Security Access and Passwords The first time the UPS is powered up by LGS it allows the Operator to navigate through all of the menu options in order to program the Non Volatile RAM This is referred to as the COLD START Thereafter only the SYSTEM RATINGS and Operator SETTINGS can be changed without Security Access NOTE If Operator accidentally sets a site parameter digit to a wrong value return to the System Configuration screen navigate to the desired screen and re set 38 Operation System Ratings System rating parameters are normally entered by the factory or LGS To get to the System Ratings screen begin at the Main Menu Using the arrow keys move to Config uration and press SELECT This brings up the Configuration screen See Figure 40 From the Configuration screen highlight System Ratings and press SELECT Figure 41 System ratings page 1 SYSTEM RATINGS KVA SYSTEM POWER FACTOR INPUT VOLTS OUTPUT VOLTS BYPASS VOLTS NEXT
112. on then System Settings then Options then Motorized Battery Breaker and select Motorized Once in Auto Restart mode a new screen will report the progress See Figure 104 Figure 104Auto restart screen layout AUTO RESTART AUTO RESTART IN PROGRESS QUALIFYING INPUT POWER CANCEL The message AUTO RESTART IN PROGRESS will be displayed during the Auto Restart sequence The text line below this message signifies the condition being checked and flashes in reverse video while the message is displayed The Operator can cancel the Auto Restart operation by selecting and acknowledging CANCEL When this is done a message will appear asking Canceling will abort Auto Restart operation Are you sure you want to cancel The Operator can then select YES or NO Alarm Notifications At the start of Auto Restart operations an alarm condition is recorded to log Auto Restart Initiated If during the process Auto Restart is halted as a result of failed condition a subsequent alarm is recorded as Auto Restart Failed This will be a latched alarm and must be acknowledged and reset by the Operator See Alarm Messages on page 74 for a complete description of these alarms Auto Restart Trigger Condition Any time the UPS detects and records an EOD End of Discharge condition occurring at the same time the input contactor is open it recognizes that the batteries can no longer support the load This scenario sets the Auto Restar
113. on switch located on the SWGR Board then perform start up The UPS output is not synchronized to the bypass power source the static bypass switch is disconnected or it has failed internally Emergency and overload transfer SBS to the bypass source is not available f the Unable SBS Unable Alarm NO NO NO YES module does not have a manual disconnect switch open and re close the static switch fuseholder If the alarm conditions are automatically corrected reset the alarm to clear it Contact Liebert Global Services if the alarm stays on Transfer To Transfer To Shows after a successful transfer to Byp OK Bypass OK MESES NO MES Bypass Display is only momentary Occurs on systems with multiple battery cabinets Indicates that at least one battery Low batt Reduced breaker is on and one or more battery capacit Battery Alarm YES YES NO YES breakers in the string are off In this state pacity Capacity the calculations for battery time remaining and End of Discharge are adjusted accordingly Inv Off b The User has turned the inverter off through User y Inv Off by User Alarm YES YES NO YES the front panel Puts data into the event history log With the battery breaker closed the UPS has determined that the DC bus voltage has reached the user settable Battery Low ce ta Alarm YES YES NO YES Warning set point Complete the controlled 9 9 shutdown of the critical load Reset the alarms if the input power is restored before shutdow
114. operly contact Liebert Global Services Battery Low Battery Low xfer Transfer DC bus voltage is 15 or more over the nominal DC Bus Voltage The UPS will Fault YES YES NO YES transfer the load to Bypass and will shut down and isolate the UPS Module Contact Liebert Global Services immediately DC Ov DC Overvolt Transient Transient The power conductors on the Input line are not wired to the UPS in the required sequence This alarm should appear only during initial start up or after a repair to the source power system Disconnect power from the Input line and correct the wiring Liebert Global Services must be present during initial start up of your UPS System Inp Phase Input Phase Rot Error Rotation Error Fault NO NO NO YES At least one fuse has opened The UPS automatically transfers the critical load to the bypass line Contactors trip open to Fault YES YES NO YES shut down and isolate the UPS module Contact Liebert Global Services immediately Do not attempt to reset the circuit breakers Rectifier Fuse Rectifier Fuse Fail Fail 74 Operation Table 7 Alarms functions and corrective actions continued Actual Alarm fault Name Displayed On Front Panel Trap Fuse Fail Description of Alarm Fault Trap Fuse Fail Fault Or Alarm Fault Latch Mask NO Dial Mask YES Freeze Mask NO Event Log Mask YES Meaning and Correctiv
115. optional Remote Alarm Status Panel This Panel provides eight LED indicators and may be placed at a convenient location near the critical load A functional description of the Remote Alarm Status Panel is provided in 3 5 3 Remote Alarm Status Panel 7 Open Comms Discrete Output Option OC DO Programmable Relay Board Each option has 8 channels Up to two Programmable Relay options can be installed in the same UPS Any alarm event can be programmed onto any channel or channels Programming is performed through the LCD display Each relay channel has two sets of Form C dry contacts rated 1 Amp 30 VDC or 250 mAmp 125 VAC 8 Open Comms Discrete Input Option OC DI Input Contact Isolator Provides UPS module interface for up to eight user relay inputs normally open dry contacts for user alarm messages The user through the LCD display can program the UPS alarm messages The input alarm can also be installed to trigger an Open Comms Discrete Output Option channel Each alarm can have auto dial event log and time delay 0 to 999 9 seconds 9 Optional Power Supply OPS An additional control power supply is required when a Remote Alarm Status Panel and or three or more battery circuit breakers are present in the system 10 Internal Modem Provides a 2400 baud modem in the UPS capable of dialing out from the UPS or accepting incoming calls and connecting to a remote terminal computer or PC A command set allows the user to view the alarm
116. panel should look like Figure 22 If the Static Switch contactors are closed then the load is supported by Static Switch and you are clear to move the Rotary Switch to the NORMAL position and move on to Auto Startup on page 28 If the Static Switch contactors are not closed repeat the above procedure If this still does not close the static switch contact Liebert Global Services for assistance CAUTION If on Static Bypass make sure the Static Switch is closed Figure 22 before turning the Rotary Switch to normal Ifthe Static Switch is not closed and the Rotary Switch is turned to the normal position the load will be disconnected Figure 23 Startup shutdown procedures screen STARTUP SHUTDOWN AUTO STARTUP MANUAL STARTUP USER SHUTDOWN EXIT Auto Startup Normally the Operator will choose to start the system automatically for the sake of convenience To begin the auto start up sequence select MAIN MENU from the MIMIC screen This will bring up the MAIN MENU Screen Figure 9 From this screen select STARTUP SHUTDOWN This will take you to the STARTUP SHUTDOWN screen Figure 23 Move the cursor to AUTO STARTUP and press SELECT AUTO STARTUP mode starts the rectifier and inverter and transfers the load to the inverter The operator needs only perform one action when prompted CLOSE MANUAL BATTERY BREAKER This action must be performed promptly within 90 seconds Otherwise the startup oper ation is aborted and an error mess
117. pment characteristically includes both nonlinear and linear load components Unbalanced Load Characteristics Unbalanced loads are actively regulated The phase to phase voltage balance is maintained to within 2 even with a 50 load imbalance Static Bypass Switch A static bypass switch is an integral part ofthe UPS An automatic transfer control circuit senses the status of the operator controls UPS logic signals and alarm messages and critical bus operating con ditions If the inverter output can no longer supply the critical load the static bypass switch automat ically transfers the critical load to the bypass source without interruption Static Switch Backfeed Protection The static bypass system is equipped with redundant disconnect circuits that prevent backfeed of lethal voltage to the bypass input in the event of a shorted static switch SCR If a shorted SCR is detected the static bypass switch is isolated and an alarm is annunciated at the UPS control panel while the critical load remains on UPS output power Pulsed Parallel Operation When an overload condition such as magnetic inrush current or a branch load circuit fault exceeds 200 of the full load current rating the static bypass switch pulses on for 10 cycles This allows up to 6000 amperes from the bypass line to clear the overload without a complete transfer to bypass a Lie bert design exclusive The bypass source is in parallel with the UPS system permitting the
118. power supply failure or inverter output symmetry failure The load automatically transfers to the bypass line The UPS module is shut down and isolated Contact Liebert Global Services at once Do not attempt to reset the UPS Opt pwr supply Fail Option Power Supply Fail Fault YES YES NO YES The Option Power Supply has failed Remote Alarm Status panels may be disabled Contact Liebert Global Service 79 Operation Table 7 Alarms functions and corrective actions continued Actual Alarm fault Name Displayed On Front Panel Batt Discharging Description of Alarm Fault Battery Discharge Fault Or Alarm Alarm Latch Mask NO Dial Mask Freeze Mask YES NO Event Log Mask YES Meaning and Corrective Action s The battery is discharging This occurs whenever the battery supplies power to the load for more than five seconds because of input power failure a rectifier problem or an overload condition If the input power or a source of auxiliary power is restored to the UPS module the UPS automatically returns to normal operation Watch the battery voltage carefully Reduce the load begin controlled shutdown to extend the battery back up time Start the back up generator if available Reset the UPS alarms after the input power is restored The message clears after 30 seconds Input Imbalance Input Current Imbalance
119. r Heatsink Overtemp Limit Outlet Air Overtemp Limit Fault Load Transfer to Bypass Transfer Failed Shutdown Figure 39 History log faults alarms report screen HISTORY LOG 1 P3 FAULTS ALARMS 14 22 29 02 10 00 DC OV TRANSIENT RECTIFIER FUSE FAIL INPUT OF UF INPUT OF UF NEXT PREV WARN STATUS EXIT FRAME 40 37 Operation As previously mentioned faults are shown in reverse video and alarms in regular video For a com plete list of all the alarm messages and corrective actions for these faults refer to Table 7 Alarms functions and corrective actions NOTE The Emergency Off and Hardware Shutdown alarms will also freeze the History Status buffer with the Auto Transfer to Bypass alarm if the load is on the UPS system when the alarm condition occurs The History Status buffer does not resume collecting new frames until the fault is cleared 3 3 5 Configuration Screens The Configuration Screens are used to set specific parameters or to view settings configured by the factory or Liebert Global Services LGS To access the System Configuration Screens go to the Main Menu move the highlighted cursor to SYSTEM CONFIGURATION and press Select Figure 40 Configuration screen CONFIGURATION SYSTEM SETTINGS USER SETTINGS FACTORY SETTINGS ALARM MASK CUSTOMER ALARM INTERFACE EXIT The System Configuration screen lists parameters that can be changed to adjust your UPS m
120. r defined text when displaying these alarms The System has been notified from the OC Input Contact Input Contact DI option that a customer alarm has been 7 7 Aam VES ee NO MES activated The system will substitute user defined text when displaying these alarms The System has been notified from the OC Input Contact Input Contact DI option that a customer alarm has been 8 8 Alarm YES YES NO YES activated The system will substitute user defined text when displaying these alarms NOTE There are 8 alarms on the Remote Alarm Status Panel See 3 5 3 Remote Alarm Status Panel 3 4 3 Status Status conditions give the Operator additional knowledge about UPS operation Some are indicated on the Mimic Display screen by a text message while others are depicted graphically The following status messages may appear in the Operator display Static Switch Connected The static switch is connected the disconnect switches are closed ON and is ready to provide a current path from the bypass input to the load Static Switch Disconnected The static switch is disconnected the disconnect switches are open OFF for maintenance procedures OK to Transfer The UPS system voltage frequency and phase match the bypass line This means that a transfer between the bypass line and the UPS is permitted Not OK to Transfer Either the UPS or bypass voltage frequency or phase is not within the spec ified limits or the static bypass swit
121. r Accumulated of Overload Conditions Accumulated of Unsuccessful Auto Retransfers Average Load Figure 105System status screen SYSTEM STATUS INSTALLED HOURS OPERATING HOURS ON UPS OPERATING HOURS ON BYPASS BACKUP TIMF SIGN OFF DATE 10 30 01 MAI EXIT 68 Operation The Sign Off Date segues to Sign Off Time and back every 5 seconds Figure 106System status screen page 2 SYSTEM STATUS MANUAL XFERS MANUAL REXFERS ALL XFERS ALL REXFERS SIGN OFF DATE 10 30 01 WG PREV EXIT Figure 107System status screen page 3 SYSTEM STATUS BROWN OUTS 0 BLACK OUTS 0 BACKUP TIME 0H 00M 00S SIGN OFF DATE 02 15 02 NEXT PREV SAVE 8 EXIT A brownout occurs when an Input Undervoltage condition exists for more than 5 minutes During this time Input Line Fail condition is not active To determine the brown out count highlight BROWN OUTS and press SELECT Once a count is made allow 30 minutes to re arm the counter The condition for blackout occurs any time all 3 phases of the input voltage sources falls below 60 of the rated input voltage rating The counter starts from the time the Liebert Global Services completes the startup procedure and signs off the SYSTEM STATUS Screen The counter is automatically re enabled when all 3 phases of the input voltage source rise above the 60 limit The Accumulated Number Of Blackouts Blackout Counter can be viewed by highlighting BLACK OUTS and pressing SELECT Figure
122. r Clear parm NO NO NO YES the new log Momentary display Sets flag in the event history log With the battery breaker closed the battery voltage has not reached 95 of the units DC Float Voltage set point within a Pia Battery Not alarm YES NO NO YES calculated time based on the test duration ging ging This calculation will start immediately at the end of a successful Passed battery self test The UPS has detected a communication UPSC MM UPSC MM failure between its UPS controls and it comm Fail Comm Fail Alarmi YES YES NO YES monitoring system Contact Liebert Global Service User User The User has initiated an Inverter Off or Alarm YES YES NO YES System Shutdown through the User Shutdown Shutdown Shutdown screen Cant Exec Cannot The battery test could not be performed Execute Alarm NO NO NO YES See 3 3 7 Battery Management Batt Test Battery Test Batt Not Battery Not A battery test cannot be executed because Charged Charged Alarm AS NO NO MES the battery charge is less than 90 Svs Time Set System Time The User has changed the Date or Time Sy O Set By Alarm YES YES NO YES from the front Panel Momentary display y P Operator Sets flag in the event history log The User has ordered a manual transfer Manual XFER Manual Alarm NO NO NO YES from UPS to Bypass from the front panel Transfer controls Momentary display Sets flag in the event history log The User has ordered a
123. ransfer is not allowed MANUAL TRANSFER RETRANSFER BYPASS INVERTER INTERNAL BYPASS SWITCH NORMAL EXT MAINT SWITCH ON LINE INVERTER IN SYNC TRANSFER NOT ALLOWED OK EXIT 33 Operation The message Retransfer to UPS or Transfer to Bypass will appear depending on status of the critical load The operator has two choices Either to accept OK or EXIT If a transfer or retransfer is not allowed the FLASHING message Transfer Not Allowed is displayed Press EXIT to return to the MAIN MENU For more information see 3 3 6 Manual Transfer 3 3 4 Status Reports Status Reports contain sequential information about fault and alarm signals To access the Status Report screens navigate to the MAIN MENU and highlight STATUS REPORTS Press the Select button and the following STATUS REPORTS screen is displayed Figure 33 Status report screen STATUS REPORTS EVENT LOG SYSTEM STATUS HISTORY LOG 1 CLEAR HISTORY LOGS HISTORY LOG 2 CLEAR EVENT LOG EXIT 0 Liebert The Status Report screen is divided into six submenus EVENT LOG HISTORY LOG 1 HISTORY LOG 2 SYSTEM STATUS CLEAR HISTORY LOGS and CLEAR EVENT LOGS To look at any of the reports do the following 1 From the Status Reports screen press the Up or Down button to move the highlighted cursor to the desired selection 2 Press the Select button to view the desired report page To return to the Main Menu highlight EXIT and press Select NOTE The
124. rcuit breaker might have been opened either manually or automatically in a UPS shutdown procedure If the UPS is operating with this breaker open the critical load is not protected from loss of the utility source power Manual closure of the battery breaker is inhibited You must use the front panel to set up the sequence for manual battery re closure Follow the instructions in manual start up Batt Supp Active Batt sup plement is active Alarm NO YES NO YES This condition is indicated when the Batt Discharging and Input Undervoltage alarms are simultaneously active The alarm will clear when the Inp Undervoltage alarm clears and or if the rectifier turns off and or if the Batt Dischg alarm clears Bypass Sync Error Bypass Sync Error Alarm NO YES NO YES The bypass is out of sync to a sufficient degree that transfer to Static Bypass is inhibited An interrupted transfer will be permitted only in the case of a critical fault If this alarm persists contact Liebert Global Services Byp out Tolerance Bypass Voltage Out of Tolerance Alarm NO YES NO YES One or more bypass voltages is below 80 or above 115 of the nominal value If the load is on UPS and the unit is a dual input unit transfers to bypass will be inhibited If the unit is a single input unit the system will shut down The Alarm will be cleared 5 seconds after all voltage are again with 85 110 of
125. re 91 Figure 92 Figure 93 Figure 94 Figure 95 Figure 96 Figure 97 Figure 98 Figure 99 Options sereen pagel sxc shee A PN A EOS I I SS 43 10 passive filter settings screen 43 Options SCFeGI PAGO ass A A A oat A ane ae om aan ae Sis ed 44 Options sGreene Page di A a eR acta a faces Sk arcs A Es 44 Options screen page do 44 Communication options Screen page ll 45 Auto dial E E A RAS AA AD a Rd 45 Modem selection Screen cerams e itoati harea ee nent e ia aaae eens 45 Auto dial Screen page Zirma A A at At WE Tele aes 46 Pager support Configura 46 Communications options screen page 2 ee eee nee e een nee 47 User settings screen page lo 47 User settings screen page ld 47 User settings screen page Bo 48 User settin is Screen Page ics A pes ee AA SHEED Wee EL a ala Ee 48 User s ttings screen page Dargi cede tye A bee SE RGN we A eR Ree EES 48 10 Passive filter settings screen ooo 49 User se ttings scr en pag Greco eevee ae eek Se eh ee eR ee ER Ee ee 49 Factory Settings Screenic ereo Sse 8 a Od Oe Ene a Wee Sowell ened 49 Factory settings screen page 2 2 eee eee ee ee eee ene 50 Factory settings screen page 3 eee ee eee eee eee ens 50 Alann fault ame screen da Sonate a ad cna sie toe Gad oan mate 51 NS A ashes eed be eho ede Be AR PR PA aha eS 51 Customer alarm interface screen 1 eee een eee nes 53 Customer alarm interface screen page 2 ce eee tenes 53 Programmable output relay board 1 AS4
126. recise synchronization amplitude and frequency of the output voltage In addition to the inverter efficiently supplying a regulated AC output from a DC source the inverter output provides isolation between the critical load bus and the commercial source power The inverter is configured to handle most critical load inrush surges It maintains output voltage Total Harmonic Distortion THD within specifications even when handling nonlinear computer loads Output Regulation and Overload Performance The inverter is capable of sustaining full output voltage 41 of the nominal voltage for up to 150 overload at the output for as long as 60 seconds without reducing the output voltage It can also han dle at least 125 of the rated current for up to 10 minutes If an overload exceeds the system capacity and a bypass source is available the critical load is transferred to the bypass source and the inverter is disconnected from the load 11 Theory of Operation 2 2 5 Nonlinear Load Characteristics Computers and computer equipment with switching power supplies generate nonlinear currents rich in fifth and seventh harmonics The inverter pulse width modulated waveform coupled with the output filter provides a natural path for reducing the fifth and seventh harmonic currents produced by the load The inverter filter limits the output voltage THD to less than 3 with up to 100 typical electronic data processing EDP loads EDP equi
127. rform most of the manual operations The operator display screen is driven by an easy to follow menu prompted software program The internal control system executes programs which generate mes sages on this display screen Screen messages instruct the Operator during start up operation and shutdown The screen also displays status information upon request Operating the UPS consists of watching the indicators on the operator control panel and making appropriate responses Further UPS monitoring and testing is achieved by navigating through a series of menu selections on the dis play screen Figure 2 80 kVA UPS outside and inside views Table 1 Key locations on UPS Item Description Function 1 Operator Control Panel Contains Display screen Navigation buttons and Emergency Power OFF button 2 Rotary Switch Provides manual selection of Normal Bypass and Service modes 3 Fuse Blocks Contain fuses for UPS control power 14 Operation Figure 3 Operator control panel Vv 2 4 3 Table 2 Key locations on operator control panel Item Description Function 1 Emergency Power Off Button Turns power off in an emergency situation 2 Display Screen Enables Operator to monitor power flow and meter readings receive reports and execute operational procedures Navigation Buttons Enables Operator to access menu screens and make selections 15 Operation
128. rformance They also display information about any faults that have occurred in the system Total operating hours are displayed here Configuration This screen displays the current configuration of the UPS system It also enables the operator to reset the date time dial out phone numbers and System Options System Options include Temperature Compensated Charging Customer Alarm Definitions and Battery Load Test The operator can view but can not change any of the settings unless the password is entered See 3 2 Security Access and Passwords for more information Manual Transfer This screen specifies all of the steps required to manually transfer the critical load between the UPS and the bypass source Comparisons of the voltage frequency and phase synchronization of the UPS output and the bypass line are also illustrated to aid in the transfer or retransfer procedure Startup and Shutdown Procedures These screens list step by step procedures to start up UPS or to shut it down for maintenance or repairs Screens include the following Auto Startup Manual Startup and two types of Operator Shutdown procedures Battery Management These screens display information on battery self tests battery equaliza tion and battery compensated charging This enables the operator to immediately see the effects of load shedding on time remaining and to accurately assess his power resources The battery equalize screen lets the operator change the ba
129. rm NO NO NO YES A generator is supplying the system The Static Switch is off and the load is on Load On UPS Load On UPS Alarm NO NO NO YES UPS Momentary display Sets flag in the event history log The critical load is being supplied power from the bypass line and is therefore Load On Load On Alarm NO NO NO YES exposed to utility power disturbances Clear Bypass Bypass all of the alarms before attempting to retransfer the load from the bypass line to the UPS Password Password The User has modified the Password Alarm YES NO NO YES Momentary display Sets flag in the event Entered Entered history log If the Auto Restart feature is installed and enabled and the last shutdown was due to a failed Batt Low Txfer the Monitor Auto Restart Auto Restart Alarm NO NO NO YES automatically initiates the normal startup Init Initiated sequence when the source power is reapplied to normal value This alarm is issued as notification that auto restart has begun No action required Normal Normal Notification that no active alarms faults Operation Operation Alarm NO NO NO YES exist Sets flag in the event history log User Startup User has initiated either a Manual or Auto init User Startup Alarm NO NO NO YES Start up from the Start up Shutdown screen The System has been notified from the OC Input Contact Input Contact DI option that a customer alarm has been 1 1 FHS a ee NO YES activated The system will substitute user defined text when
130. rnate power source recharge operation Battery Equalize Charge Circuit The battery equalize charge feature can be manually initiated or it can be programmed to operate automatically Either can be selected from the battery equalize screen displayed on the control panel The automatic battery equalizing charge circuit increases the rectifier charger output voltage to charge the battery anytime there is a power outage of 30 seconds or longer The equalizing voltage is slightly higher than the float voltage This helps all the batteries in a string to reach a uniform state of charge NOTE Q The manufacturers of the valve regulated batteries supplied with Liebert s standard battery cabinets recommend that when first installed the batteries be equalize charged After that initial equalize charge they recommend no further equalize charging for their batteries Other manufacturers may have different recommendations for their products Consult the battery manufacturer s manual for specific information about equalize charging Inverter The inverter is a solid state device that converts the DC output of the rectifier charger or the battery to AC power Operation The inverter converts DC power from either the battery or the rectifier charger into three pulse width modulated six step waveforms These waveforms are filtered into low distortion sine wave power The inverter is controlled by a Digital Signal Processor DSP This DSP controls the p
131. rom the bypass source through the bypass switch to the load The UPS module is off as shown by the open rectifier and inverter switches Notice also that the bat tery circuit breaker is open THE MIMIC DISPLAY SCREEN The illustration below shows the five major sections of the Mimic Display Screen The numbers in the illustration correspond with the explanation below for each numbered block Figure 14 Mimic display screen detail MIMIC DISPLAY SYS STATUS 23 Operation Detailed Information Reports Detailed information reports are available through the following numbered blocks 1 INPUT STATUS To access this screen start with the Mimic Display Screen Using the arrow keys bracket INPUT and press SELECT The screen displays the UPS input voltage and current as well as additional information Press SELECT to return to the Mimic Display Screen NOTE On the Mimic Display Screen items are bracketed instead of highlighted so as not to confuse highlighting with power pathways Figure 15 Input status screen INPUT STATUS A B C FREQ 60 0 HZ 209 209 210 TEMPS DEG C 37 37 35 INLET AIR 24 OUTLET AIR 27 HEAT SINKS 1 025 2 020 3 020 NOTE All voltage readings are phase to phase measurements A B B C and C A All current readings are phase measurements A B and C The metered parameter values on the following screens are updat
132. rom the manual transfer screen MM checks the status of output and SBS contactors to verify a transfer has successfully taken place Accumulated of Manual Retransfers User initiated and successful retransfers to inverter commanded from the manual transfer screen MM checks the status of output and SBS contactors to verify a transfer has successfully taken place Accumulated of All Transfers All transfers manual and auto are counted Accumulated of All Retransfers All retransfers manual and auto are counted Accumulated of Overload Conditions For detection of an overload condition software monitors 6 alarms Inv Ovld phA Inv Ovld phB Inv Ovld phC SBS Ovld phA SBS Ovld phC SBS Ovld phC It increments the count if one or more of these alarm conditions are reported Accumulated of Unsuccessful Auto Retransfers The count is incremented upon receipt of an Auto Retransfer Failed alarm from UPSC UPS Control board Average Load Running average of 256 KVA samples over 256 seconds 70 Operation 3 4 3 4 1 Faults Alarms Status This section defines the active fault alarm and status indicators their causes and the associated system operations performed upon their detection Faults A fault is defined as an undesirable system operating condition that could cause further damage to the system or potentially drop the load Once detected faults may trigger an appropriate emergency action such as
133. ry charger attempts the equalization process only if the EQUALIZE TIME PERIOD is greater than zero the battery voltage has been at or below the Battery Discharging alarm limit for longer than 30 sec onds and the battery breaker MBD is closed MANUAL MODE This mode enables the operator to manually initiate a battery equalize charge to raise the DC bus voltage to correct a non uniformity in the individual cell voltages or specific gravity readings Figure 90 Manual screen MANUAL STOP START STOP EQUALIZE CHARGE T his selection lets the operator halt the equalizing charge to the bat tery at any time whether the circuit was activated automatically or manually EQUALIZE TIME PERIOD This selection permits the Operator to adjust the battery equalize time in one hour increments from 0 to 72 The battery equalize time must be greater than zero for the bat tery to begin recharging in both the AUTO and the MANUAL modes Use Up Down buttons to set battery equalize time and press SELECT 60 Operation Figure 91 Equalize time period screen EQUALIZE TIME PERIOD MAX 72 a When the battery is at full voltage not being recharged this selection reads EQUALIZE TIME PERIOD hrs When the battery is recharging this selection reads EQUALIZE TIME REMAINING hrs After the equalize recharge time has expired the indication returns to the preset equalize time Figure 92 Equalize voltage screen EQUALIZE VOLTAGE
134. ry set at 100 During a rectifier re start following battery discharge the current slowly ramps up walks in from 20 of the rated input current to 100 over a 15 to 20 second period The maximum rate of change of the AC input current is 15 per second The input current walk in reduces the start up surge distor tion effects on all other equipment connected to the same source and prolongs the service life of inter nal components Input Current Inrush The maximum sub cycle of inrush current is typically less than 6 8 times normal Input Power Factor The rated input power factor is no less than 0 80 lagging at the nominal input voltage and the full rated UPS load The optional input filter will improve the power factor to better than 0 92 lagging at full load Refer to drawings for your specific model Battery Charging Circuit The UPS module charging circuit is capable of recharging the battery plant to 95 of full capacity within 10 times the discharge time Recharging the last 5 takes longer because of characteristics inherent in the battery DC ripple voltage is limited to 0 5 RMS to preserve battery life during long term float charging while the UPS system is operating on utility source power Operation After Discharge When commercial power is interrupted the battery continues to supply DC power to the inverter without interruption to the critical load If the AC source power is restored before the battery has fully discharged
135. s Alarms Status for more information regarding these alarm messages 95 Maintenance 4 0 MAINTENANCE 4 1 Safety Precautions Observe the safety precautions in 1 0 Introduction ONLY qualified service personnel should perform maintenance on the UPS system Observe ALL of the warnings and cautions below before performing ANY maintenance on the UPS System and associated equipment Also observe the manufacturer s safety precautions pertaining to the battery along with the battery safety precautions in this section A CAUTION Only Liebert or Liebert trained service personnel should work on this equipment Both AC and DC high voltages are present in lethal amounts within this equipment Extreme care should be taken when working around UPS equipment Always identify the source of connecting wiring prior to disconnecting Mark any disconnected wires so they can be properly reconnected Do not substitute parts except as authorized by Liebert Corporation Maintain the UPS cabinets free of foreign materials such as solder wire cuttings etc Call Liebert Global Services if you are not sure of the procedures to follow or if you are not familiar with the design or operation of the equipment WARNING Extreme caution is required when performing maintenance Be constantly aware that the UPS system contains high DC as well as AC voltages With input power off and the battery disconnected high voltage at filter capacitor
136. s 63 Figure 100 Summary page sereno 64 Figure 101 User settings pagel eee eee ee eee eee eae 65 Figure 102 Battery time low warning screen 65 Figure 103 Auto restart setting SsCTeeO ee eee en eee eens 66 Figure 104 Auto restart screen layout 66 Figure 105 System status screen 67 Figure 106 System status screen page Lo 68 Figure 107 System status screen page Bd 68 Figure 108 System status screen page do 68 Figure 109 Summary alarm in active position Screen 6 eee eee nee nes 71 Figure 110 Summary alarm editing screen 72 Figure 111 Pager support screen 1 1 ee eee eee eee eee nes 89 Figure 112 Load on bypass UPS not available 0 0 ee eee een eens 91 Figure 113 Load on bypass UPS available and battery charging 0 ccc eee nes 91 Figure 114 Utility fail load on PAttEry ei errur en t E eee ETE nee e ees 92 TABLES Table 1 Key locations on UPS st at ehe abated dab ta da laca 08 14 Table 2 Key locations on operator control panel 0 0 0 eee eee eee nas 15 Table 3 External maintenance bypass switch positions and actions 0 cee eee ee eee eens 32 Table 4 External maintenance switch configuration options o 32 Table 5 Default tim SST ES yn hs A a he BE ees kets ie AS Mads E Aiea vant See art 58 Table 6 Abbreviations used in alarm Messages 72 Table 7 Alarms functions and corrective actions 73 Table 8 Service terminal command summary 0 0 ccc eee e
137. s and power circuits should be discharged within 30 seconds However if a power circuit failure has occurred you should assume that high voltage may still exist after shutdown Check with a voltmeter before making contact AC voltage will remain on the bypass and output contactors and the static bypass switch unless associated external circuit breakers are opened Check for voltage with both AC and DC voltmeters prior to making contact When the UPS system is under power both the operator and any test equipment must be isolated from direct contact with earth ground and the UPS chassis frame by using rubber mats Some components within the cabinets are not connected to chassis ground Any contact between floating circuits and the chassis is a lethal shock hazard use differential oscilloscopes when measuring a floating circuit The differential input should have at least 800 vrms common mode input rating and a common mode rejection ratio of at least 8odb Exercise caution that the test instrument exterior does not make contact either physically or electrically with earth ground In case of fire involving electrical equipment use only carbon dioxide fire extinguishers or others approved for use in electrical fire fighting 96 Maintenance 4 2 4 2 1 4 2 2 4 2 3 Routine Maintenance You are encouraged to become thoroughly familiar with the equipment but at no time should you go beyond the specific procedures in th
138. s password protected See 3 2 Security Access and Passwords for more information on Security Access and Passwords After highlighting Single Dual Input from the System Settings Screen and pressing SELECT the following screen will appear Figure 48 Enter password screen ENTER PASSWORD You must enter your secure password to access the next screen The position of each of the four digits of the password is indicated by the mark below the zero The system will remain password free for five minutes allowing changes to be made Highlighting either Single or Dual and pressing SELECT saves changes and returns the Operator to the System Settings screen Figure 49 Single dual input screen SINGLE DUAL INPUT 42 Operation Options This multiple page screen accessed from the third page of the SYSTEM SETTINGS screen enables and disables optional features which might or might not be installed in your UPS To enable or dis able one of these options do the following 1 Highlight the option you wish to enable or disable 2 Press UP or DOWN to toggle between enabled or disabled 3 Press SELECT to set the desired status NOTE Some of the options appearing on the following screens are reserved for future development Figure 50 Options screen page 1 OPTIONS 10 PASSIVE FILTER NO ACTIVE FILTER NO LBS NO GENERATOR NO AUTO RESTART NO NEXT EXIT Highlighting 10 PASSIVE OPTIONS and pressing SEL
139. s with both the external and internal modems Its function is to provide pager support alphanumeric and numeric for the Npower system The Pager Support Screen can be accessed by starting with SYSTEM CONFIGURATION and navi gating to COMM OPTIONS and then to PAGER SUPPORT CONFIGURATION Figure 111 Pager support screen PAGER SUPPORT CONFIGURATION PAGER ENABLED YES PAGER PHONE NUMBER 8003433433 PIN NUMBER 11111111 From this screen you can enable or disable the pager and set it to the pin number required for alpha numeric paging on Skytel The PAGER ENABLED field can be set to YES or NO This is interlocked with the modem option Pager support requires the modem The PAGER PHONE NUMBER can have a maximum of 20 digits This entry is blank when the NVRAM is first initialized The PIN NUMBER can have a maximum of 20 digits The default pin number is 00000000 Note Changes to these pager parameters aren t saved into NVRAM until you select Save amp Exit when you leave the configuration menu screens 90 Operation 3 5 3 3 5 4 PROTOCOL The pager module uses the Telocator Alphanumeric Protocol TAP which is the protocol used for SkyTel pagers A copy of this protocol is included with the pager option Pager support requires the same hardware that modem support requires The internal modem is quite adequate Since the pager option uses the same modem that the modem option uses careful thought has
140. source power the UPS maintains power to the load until an alternate source of power is activated or until the original power source is restored If input AC power is not restored the UPS maintains the load with the battery plant long enough that the critical equipment can be shut down in an orderly manner The Npower UPS module displays the rate of battery dis charge and calculates the amount of battery time remaining based on the actual connected load The time that the battery will maintain the load depends on the capacity of the battery backup plant and the size of the load The system control logic automatically manages critical bus operation System logic is resident in Dig ital Signal Processors DSPs for precise control and improved reliability If the critical load current exceeds the rated load of the Npower UPS system the control logic deter mines the magnitude of the overload and reacts appropriately Overloads are usually the result of inrush current requirements The UPS system supports loads that are 150 of the rated load for up to 60 seconds 125 of the rated load for up to ten minutes and 104 of the rated load indefinitely If the load surpasses the overload capacity of the UPS the load is automatically transferred to bypass without interruption When the load returns to within the UPS rating it is either automatically or manually returned retransferred to the UPS How and when the load is returned to the UPS depends on
141. splay screen with load on bypass and switches closed MIMIC DISPLAY BYPASS MN RECT J s LOAD ENE SYS STATUS Liebert 27 Operation Second Scenario Power is supplied to the UPS and the UPS is supplying the load Upstream breakers are closed The UPS should be showing either the SYSTEM RATINGS screen or the Mimic display Ifthe SYS TEM RATINGS screen is showing use the arrow keys to select SAVE amp EXIT and push SELECT This will advance you to the USER SETTINGS screen The USER SETTINGS have been pre set at the factory However they may be customized for your site See 3 3 5 Configuration Screens for detail information on configuration screens You can change these configurations at any time Use the arrow keys to move the cursor to SAVE EXIT and push SELECT This will move you to the MIMIC screen Check the MIMIC screen to make sure the static switch contactors are closed The screen should look like Figure 22 If the Static Switch Contactors are open Figure 24 transferring to the NORMAL position will DISCONNECT THE LOAD To close the Static Switch contactors locate the Rotary Switch located on the inside of the cabinet on the lower right side as you face the cabinet Turn the Rotary Switch to the SERVICE position Wait for 10 seconds Return the Rotary Switch to the BYPASS position This should reset the Static Switch contactors to the closed position and the MIMIC
142. t cycle when battery current enters the Normal operating range of 1 The normal range is displayed as NORM in the battery section of the one line Mimic screen When battery current exceeds 1 in the positive direction the displayed status is changed to CHG charge and when drops in the negative direction by more than 1 it is displayed as DIS discharge Battery AMPS resolution is 0 1 When an End of Discharge condition occurs fault BATT LOW TRANSFER the cycle is terminated cycle and summary data saved and the cycle is re armed The same thing happens in the event of a loss of communications with UPSC alarm UPSC MM COMM FAIL After approximately 10 sec onds the BCM is re armed for the next cycle 64 Operation BCM DATA DEFINITIONS STORAGE At the start of every discharge cycle Time and Date are recorded along with Battery Compartment Temperature in degrees C While the cycle is in progress the following data are stored Lowest DC Bus Voltage Battery KW Hours and Highest Battery Discharge AMPS At the end of the cycle all of these parameters including Cycle Duration in seconds and Summary data including Accumulated Number Of Cycles Accumulated Battery Amp Hours and Accumulated Battery KW hours are stored A total of 132 cycles are saved in a circular buffer BCM ALARM NOTIFICATION When the number of cycles exceeds 128 an alarm message will be displayed to alert the user local and remote that the
143. t flag initiating the Auto Restart sequence In a Dual Input system both Input and Bypass must be available to enable Auto Restart 67 Operation 3 3 9 System Status Monitoring In addition to the standard UPS metering and alarm information Npower monitors and calculates other relevant data This data can be accessed by starting from the Main Menu selecting Status Reports then System Status The counters start from the time LGS or in special cases the contractor complete the startup proce dure and customer accepts the system Once the unit is accepted LGS will go to the System Status screen and complete the sign off procedure This is a password protected screen Once the sign off pro cedure is completed easy to follow on screen prompt messages the software will record the Real Time Clock s time and date The sign off screen will no longer be displayed in any subsequent entries in System Status screen Only the Date and Time of system sign off will be shown as reference All future data gathering will start from this date and time The System Status Screens contain the following data which is updated real time Accumulated Installed Hours Accumulated Operating Hours on UPS Accumulated Operating Hours on Bypass Accumulated Backup Minutes Accumulated of Brown Outs Accumulated of Black Outs Accumulated of Manual Transfers Accumulated of Manual Retransfers Accumulated of All Transfers Accumulated of All Retransfe
144. the power semiconductor heatsinks detect temperatures above the steady state limits for these components Heatsink The control logic sets off the alarm but does Heatsink Overtemp Alarm NO YES NO YES not shut down the UPS module if the Ovtemp Warni condition lasts less than 10 minutes Check arning nike 2 the air intake air exhaust and filters Reduce the load or transfer it to bypass Contact Liebert Global Services if the alarm persists The intake air to the UPS module exceeds the specified maximum temperature This Inlet Air Inlet Air condition only causes an alarm but should Ovtem Overtemp Alarm NO YES NO YES be corrected immediately to prevent P Warning equipment overheating Check to make sure nothing is blocking the inlet air and that the air filter is clean E The Outlet air temperature has exceeded Ups Ambient UPS Ambient Alarm NO YES NO YES 85 of its Maximum outlet air temperature OvTemp OvTemp limit A fault in the designated Fan motor has occurred This condition only causes an alarm but if not promptly corrected it could Pwr pole Fan Power pole cause an equipment over temperature 1 Fail Fan 1 Fail Aam NO MES N YES condition that would shut down the UPS Module Check the Fans for proper operation Contact Liebert Global Services if you require assistance or to replace a fan A fault in the designated Fan motor has occurred This condition only causes an alarm but if not promptly corrected it could Pwr pole F
145. ther brands of UPS products Furthermore these DSPs are isolated from heat generating components to ensure optimal operating temperatures Factory Backup and Service Assistance Reliability depends on more than just UPS module design Improper installation can cause any sys tem to fail To prevent this service technicians from Liebert Global Services thoroughly inspect the installation of all our systems to ensure they are installed properly and operating within performance specifications Once a UPS is properly installed you the on site equipment operator are the most important fac tor in preventing critical bus failures or unplanned transfers to bypass To make your task easier the UPS provides easy to follow prompted instructions on its operator display screen If you ever need help call your Liebert distributor or sales representative Your attention to proper installation operation and periodic maintenance will ensure that your mission critical operations receive the best possible protection from electrical disturbances and outages Versatility The Npower has a number of features and options that can be customized to your specific needs See 1 5 Options for details Visit the battery manufacturer s Web site for information on obtaining the manual if you don t already have it Safety Precautions Read this manual thoroughly paying special attention to the sections that apply to you before work ing with the UPS Also r
146. to 126 C product specifica tions call for the operating range of 0 40 C Any readings outside that range will be displayed as To view the complete list in the event use the UP and DOWN selections to scroll the page up or down 63 Operation Selecting the TIME button will display the time stamp of each cycle for three seconds after which it repaints the column with DATE stamps again Figure 99 0 30 seconds discharge cycles 0 30 SECONDS DISCHARGE CYCLES DATE SEC MIN DC MAX A KWH 4 04 26 01 21 443 100 1 02 09 01 25 439 89 TIME DOWN UP SUMMARY PAGE LAYOUT The Summary Page Screen is accessed from the Battery Cycle Monitor Screen The BCM summary page includes the following information Accumulated number of all discharge cycles Accumulated or active time on battery Accumulated or active battery AMP hours Accumulated or active battery KW hours The upper range of all the accumulated numbers is kept in two long integers to make certain they don t overflow Figure 100Summary page screen SUMMARY PAGE ACCUMULATED NUMBER OF CYCLES ACCUMULATED BATTERY TIME SEC ACCUMULATED BATTERY AMP HOURS ACCUMULATED BATTERY KW HOURS EXIT DISCHARGE CYCLE DETECTION RE ARMING METHOD A battery discharge cycle starts with the reversal of battery current discharge AMPS The discharge current has to be greater than 2 of battery discharge rating The cycle is terminated and re armed reset conditions for nex
147. tor op disable To correct repair and restart batt via the MM Contact Liebert Global Services for assistance Byp pwr supply fail Bypass Power Supply Fail Fault NO YES NO YES With Bypass source available the UPS has determined that the bypass power supply has failed The SBS will be turned off and the contactors opened SBS will not be available This fault will inhibit transfers and start up Contact Liebert Global Services immediately EPO shutdown EPO Shutdown Fault NO YES NO YES The Emergency Power Off switch has been pressed which caused the UPS system to shut down and remove all power from the critical load Determine the cause of the emergency condition and correct it if possible Contact Liebert Global Services if you require assistance 77 Operation Table 7 Alarms functions and corrective actions continued Actual Alarm fault Name Displayed On Front Panel Hsink ovtemp limit Description of Alarm Fault Heatsink Overtemp Limit Fault Or Alarm Fault Latch Mask YES Dial Mask YES Freeze Mask YES Event Log Mask YES Meaning and Corrective Action s The maximum heat sink temperature limit has been exceeded Should be preceded by a Heatsink Overtemp Warning alarm The load will be transferred to the Static Bypass if available If the load was already on SBS when this alarm occ
148. tored or an alternate power source is not available the battery can be sized to provide power long enough for an orderly shutdown of the load Theory of Operation 2 2 2 2 1 Detailed Component Descriptions Controls Hardware The Npower UPS operator interface display system is designed to provide all of the information that is required for the operation of each UPS module The following is a list of the hardware features 1 The control logic performs automatic operations with minimal operator interface The limited number of manual controls are easy to use 2 Each Npower UPS cabinet is equipped with an easy to read liquid crystal display LCD screen It presents information in a way that is easy to understand at an eye level front panel location 3 The display is controlled by a dedicated microprocessor with a non volatile EPROM program and a battery backed event memory 4 The Npower can be ordered with communication ports for a Transmission of present status information to remote terminals via a resident auto dial communications program and an external or optional internal modem This port also responds to inquiries of the UPS and history from the remote terminal b Reporting UPS and history information in response to inquiries from a local terminal no modem required c Reporting information to a Liebert SiteScan Central Monitoring System d Relaying selected alarm messages to a Liebert Remote Alarm Status Panel a
149. ttery equalize recharging mode from manual to automatic and to observe or change the equalize time Battery equalize charge voltage is higher than battery float constant charge voltage NOTE Q The manufacturers of the valve regulated batteries supplied with Liebert s standard battery cabinets recommend that when first installed the batteries be equalize charged After that initial equalize charge they recommend no further equalize charging for their batteries Other manufacturers may have different recommendations for their products Consult the battery manufacturer s manual for specific information about equalize charging Secondary Screens The secondary screens show detailed information relating to the primary screens These screens are illustrated below under each primary screen Like the primary screens the secondary screens may also consist of multiple pages To get to the next page highlight and Select the word NEXT To return to the previous screen highlight and Select the word PREV STATUS INFORMATION Module status information is available on the display screen when the Control Power is ON even when the UPS module is not operating The same system status information is also available at local and remote terminals See 3 3 4 Status Reports for information on status reports and 3 5 Com munication Interfaces for information on Operator communication interfaces If a module display screen is blank either power is not avail
150. ule output voltage is under the minimum 12 deviation from nominal The load automatically transfers to the bypass line f the alarm condition is no longer present reset the alarm and retransfer the load from bypass to UPS Contact Liebert Global Services if alarm persists SBS SCR Open SBS SCR Open Fault YES YES NO YES This fault can only be detected when the load is on bypass One or more of the Static Bypass phases are open The static switch will be shut down and the UPS will shut down Power to the load will be lost Contact Liebert Global Services Immediately SBS SCR Shorted SBS SCR Shorted Fault YES YES NO YES The system has detected a shorted SCR in the Bypass line If the unit is in the start up mode start up will be inhibited If the unit is on UPS the unit will transfer to Bypass and open the output contactor to prevent back feed to the inverter from the Bypass line Contact Liebert Global Services Immediately 76 Operation Table 7 Alarms functions and corrective actions continued Actual Alarm fault Name Displayed On Front Panel Inv limit xfer Description of Alarm Fault Inverter Current Limit Transfer Fault Or Alarm Fault Latch Mask NO Dial Mask YES Freeze Mask NO Event Log Mask YES Meaning and Corrective Action s The instantaneous inverter current of any one
151. umber and type of batteries WARNING Lead acid batteries contain hazardous materials Batteries must be handled transported and recycled or discarded in accordance with federal state and local regulations Because lead is a toxic substance lead acid batteries should be recycled rather than discarded Do not dispose of battery or batteries in a fire The battery may explode Do not open or mutilate the battery or batteries Released electrolyte is harmful to the skin and eyes It may be toxic A battery can present a risk of electrical shock and high short circuit current The following precautions should be observed when working on batteries e Remove watches rings and other metal objects e Use tools with insulated handles e Wear rubber gloves and boots Do not lay tools or metal parts on top of batteries e Disconnect charging source prior to connecting or disconnecting battery terminals Determine if battery is inadvertently grounded If inadvertently grounded remove source of ground Contact with any part of a grounded battery can result in electrical shock The likelihood of such shock will be reduced if such grounds are removed during installation and maintenance Lead acid batteries can present a risk of fire because they generate hydrogen gas In addi tion the electrical connections must be protected against accidental short circuits which can cause sparks The following procedures should be followed DO NOT S
152. urred the system will shut down The fault will clear when the temperature falls below the Heatsink Overtemp Warning threshold If this fault doesn t clear soon enough it will lead to an Overtemp Time out Shutdown If the unit is still running it will make an attempt to auto retransfer when the fault clears If the faults do not clear contact Liebert Global Services Inp pwr supply fail Input Power Supply Fail Fault NO YES NO YES The input source is present but the input power supply has failed The unit has redundant power supplies on both the input and the output Contact Liebert Global Services immediately Out pwr supply fail Output Power Supply Fail Fault NO YES NO YES The output source is present but the output power supply has failed The unit has redundant power supplies on both the input and the output Contact Liebert Global Services immediately Ups Ambient Limit UPS Ambient Ot Limit Fault YES YES YES YES The Outlet air temperature has exceeded its maximum set point The UPS will transfer the load to bypass if available If already on bypass the system will shutdown The fault will clear when the temperature falls below the Outlet Air Overtemp Warning threshold If this fault doesn t clear soon enough it will lead to an overtemp Time out Shutdown If the unit is still running when the fault clears it will auto retransfer to UPS C
153. without bring ing the battery online select SKIP Last the Operator will see the MANUAL TRANSFER RETRANSFER screen To move the unit from BYPASS to UPS operation use the arrow keys to select RETRANSFER TO UPS and push the SELECT button At any time during the above sequences the Operator can choose to abort the procedure The load will remain on bypass while the rectifier and inverter are powered down In addition any internal failure will automatically inhibit startup From here on the Operator may monitor faults alarms data and other information by navigating to primary screens from the Main Menu screen or by navigating to secondary screens from any of the primary screens SIB External Maintenance Bypass An External Maintenance Bypass Switch can be added by Liebert or supplied by the Customer The Liebert supplied option is outlined in Figure 27 and Figure 28 for the single input and dual input options respectively The rotary switch has three independent power contacts on a common shaft A set of auxiliary contacts is incorporated into the shaft to determine the power switch position The auxiliary contacts if provided will be connected to pins 9 10 of TB70 of the UPS module The UPS module shipped from the factory will have pins 9 10 jumpered so that the UPS internal logic will ignore the External Maintenance Bypass switch conditions Figure 27 External maintenance bypass switch dual input UPS S1 B Bypass Input Critical Lo
154. y screen example load on bypass UPS module on and charging battery 22 Monitor mimic display screen example load on bypass UPS module off service mode 23 Mimic display screen detal 23 Top t status Screenin a Be be a Be a ed ERR ME LS ES Ba 8 24 DCE b s 1 Battery stats iced aes haw an A to eta se ee elt E Sate te ee ee 24 Bypassuinputstatus a Cees SIS oe eS ee een Bee eed Doc a EE 25 Output load status Screens ooo od eke we do een Seas BREE ween bbe WR ers Bie eg a We a Be ee a 25 Active faults and alarms SCT 26 Active faults and alarms loss of power 26 DY Stem ratings SCHOEN sex sev A vai ee howe Scape dobsta aca A seas aoa bes dara 27 Mimic display screen with load on bypass and switches closed 00 0 27 Startup shutdown procedures serena 28 Manual startup screen close static switch contactors screen 0 0 cece eee 29 Parget and ramp Valles enin sn A AL WR AA Dd ay ahs AR inl da 29 DE bus Setpomit SCreen ies ii Ae byes de blk sabe E dt dll vite Re ha me ey us Secie de idas 29 External maintenance bypass switch dual input UPS 0 0 0 c ces 31 External maintenance bypass switch single input UPS 0 0 0 0 ccc eens 31 Set number of battery cabinets screen 33 User shutdown screeiy dit la id delle Ce Aled 34 Manual transfer retransfer screen when transfer is allowed oooooooooo 34 Manual transfer retransfer screen when transfer is not allowed
155. you must also press the ALARM RESET button after the alarm condition is corrected Faults and Alarms The Npower is designed to alert the Operator to system conditions that warrant careful monitoring and or corrective action A fault is an undesirable system condition that can cause further damage to the system or potentially drop the load if not acted upon An alarm indicates an abnormal system con dition significant enough to warrant being annunciated and logged During normal operation no alarm messages should be present Figure 19 Active faults and alarms screen ACTIVE FAULTS AND ALARMS USER SHUTDOWN EXIT 03 58 29 05 22 00 If input power is lost the following screen will be displayed Figure 20 Active faults and alarms loss of power ACTIVE FAULTS AND ALARMS INPUT LINE FAIL INPUT OT UF INPUT UNDERVOLTAGE BYPASS OUT TOLERANCE BYPASS LINE FAIL SBS UNABLE r pies EXIT 03 58 29 05 22 00 NOTE There are 45 different fault messages and 95 different alarm messages For a complete list refer to 3 4 1 Faults and 3 4 2 Alarms 26 Operation 3 3 2 Startup There are two start up scenarios which can be followed depending on whether there is already power supplied to the UPS and the UPS is on Bypass or there is no power to the UPS Follow the appropri ate instructions First Scenario Power is not supplied to the UPS Upstream breakers are open Locate the Rotary Switch loc
156. ypass contactor close signal and the output contactor open signal It will also turn on the SBS Automatic Retransfer operations will be disabled 31 Operation External Maintenance Bypass Switch Configurations The External Maintenance Bypass Switch has three configuration options e External maintenance bypass installed with interlock option e External maintenance bypass installed without interlock option Not installed Table 4 External maintenance switch configuration options External Maintenance Switch Option Auxiliary Contact Options Status User Prompt open On Test position or Pr Maintenance position or jumper Prompts the user to rotate to On Line position Installed with removed Just before retransfer Interlock Option closed On ON LINE position Manual or automatic start one button is default jumper allowed all the way to load being On line Se Prompts the user to install jumper just before open jumper removed retransfer Not installed dissed default i mper Manual or automatic start one button is Jump allowed all the way to load being On line l Open Jumper removed Prompts the user to install jumper just before Installed without retransfer interlock option Prompts the user to verify the switch is in on Closed default jumper line position before a retransfer is allowed Regardless of how the configuration is set if the auxiliary contacts are ope
157. ystem overloads which occur up to five select range is 0 to 5 times in 60 minutes are automatically returned to the UPS system for each event including the Nth overload A manually initiated retransfer from bypass is required for the N 1 overload Manual Retransfers Manual retransfers may be initiated at any time provided no retransfer inhibition conditions are present Retransfer Inhibited A retransfer automatic or manual from the bypass source to the UPS system shall be inhibited if any of the following conditions exist a Retransfer Inhibitions 1 Bypass frequency exceeds 0 5 Hz of the nominal 2 UPS system to bypass voltage difference DV exceeds a predetermined percentage normally 10 3 OK to Transfer signal from the control logic is not present 4 Inverter or rectifier fault b Automatic Retransfer Inhibitions in addition to those above 1 The load transfer to bypass was not caused by an output overload 2 Excessive cyclical overloads within a one hour period 3 Retransfer conditions are not satisfied within 5 minutes of the initial transfer 13 Operation 3 0 OPERATION 3 1 Operator Controls The Npower operator controls and indicators are located on the UPS Module Cabinet door and inside the cabinet See Figure 2 The Operator Control Panel is located in the upper lefthand corner of the door enabling the Operator to quickly identify the current status of the UPS system and to pe

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